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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_A503247D6FC6E1C65A932F5A03D9EE24" xlink:to="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_A503247D6FC6E1C65A932F5A03D9EE24" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalFundsEffectiveSwapRateMember_E506AA9A1368030E06C22F5A03D92D6D_terseLabel_en-US" xlink:label="lab_us-gaap_FederalFundsEffectiveSwapRateMember_E506AA9A1368030E06C22F5A03D92D6D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Funds Effective Swap Rate [Member]</link:label>
    <link:label id="lab_us-gaap_FederalFundsEffectiveSwapRateMember_E506AA9A1368030E06C22F5A03D92D6D_label_en-US" xlink:label="lab_us-gaap_FederalFundsEffectiveSwapRateMember_E506AA9A1368030E06C22F5A03D92D6D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Funds Effective Swap Rate [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalFundsEffectiveSwapRateMember" xlink:label="loc_us-gaap_FederalFundsEffectiveSwapRateMember_E506AA9A1368030E06C22F5A03D92D6D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalFundsEffectiveSwapRateMember_E506AA9A1368030E06C22F5A03D92D6D" xlink:to="lab_us-gaap_FederalFundsEffectiveSwapRateMember_E506AA9A1368030E06C22F5A03D92D6D" xlink:type="arc" />
    <link:label id="lab_us-gaap_BaseRateMember_295BCC1F643BE67EBB0F2F5A03DAD21F_terseLabel_en-US" xlink:label="lab_us-gaap_BaseRateMember_295BCC1F643BE67EBB0F2F5A03DAD21F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Base Rate [Member]</link:label>
    <link:label id="lab_us-gaap_BaseRateMember_295BCC1F643BE67EBB0F2F5A03DAD21F_label_en-US" xlink:label="lab_us-gaap_BaseRateMember_295BCC1F643BE67EBB0F2F5A03DAD21F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Base Rate [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BaseRateMember" xlink:label="loc_us-gaap_BaseRateMember_295BCC1F643BE67EBB0F2F5A03DAD21F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BaseRateMember_295BCC1F643BE67EBB0F2F5A03DAD21F" xlink:to="lab_us-gaap_BaseRateMember_295BCC1F643BE67EBB0F2F5A03DAD21F" xlink:type="arc" />
    <link:label id="lab_us-gaap_LetterOfCreditMember_46080FE744A8606D9CFB2F5A03DAD7D2_terseLabel_en-US" xlink:label="lab_us-gaap_LetterOfCreditMember_46080FE744A8606D9CFB2F5A03DAD7D2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Letter of Credit [Member]</link:label>
    <link:label id="lab_us-gaap_LetterOfCreditMember_46080FE744A8606D9CFB2F5A03DAD7D2_label_en-US" xlink:label="lab_us-gaap_LetterOfCreditMember_46080FE744A8606D9CFB2F5A03DAD7D2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Letter of Credit [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LetterOfCreditMember" xlink:label="loc_us-gaap_LetterOfCreditMember_46080FE744A8606D9CFB2F5A03DAD7D2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LetterOfCreditMember_46080FE744A8606D9CFB2F5A03DAD7D2" xlink:to="lab_us-gaap_LetterOfCreditMember_46080FE744A8606D9CFB2F5A03DAD7D2" xlink:type="arc" />
    <link:label id="lab_us-gaap_LineOfCreditMember_8536A78C6C9FAC7CC43F2F5A03DA9BC6_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditMember_8536A78C6C9FAC7CC43F2F5A03DA9BC6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of Credit [Member]</link:label>
    <link:label id="lab_us-gaap_LineOfCreditMember_8536A78C6C9FAC7CC43F2F5A03DA9BC6_label_en-US" xlink:label="lab_us-gaap_LineOfCreditMember_8536A78C6C9FAC7CC43F2F5A03DA9BC6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditMember" xlink:label="loc_us-gaap_LineOfCreditMember_8536A78C6C9FAC7CC43F2F5A03DA9BC6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditMember_8536A78C6C9FAC7CC43F2F5A03DA9BC6" xlink:to="lab_us-gaap_LineOfCreditMember_8536A78C6C9FAC7CC43F2F5A03DA9BC6" xlink:type="arc" />
    <link:label id="lab_us-gaap_ForeignLineOfCreditMember_65AC3A4F11E0D70BBA0D2F5A03DAC516_terseLabel_en-US" xlink:label="lab_us-gaap_ForeignLineOfCreditMember_65AC3A4F11E0D70BBA0D2F5A03DAC516" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign Line of Credit [Member]</link:label>
    <link:label id="lab_us-gaap_ForeignLineOfCreditMember_65AC3A4F11E0D70BBA0D2F5A03DAC516_label_en-US" xlink:label="lab_us-gaap_ForeignLineOfCreditMember_65AC3A4F11E0D70BBA0D2F5A03DAC516" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Line of Credit [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignLineOfCreditMember" xlink:label="loc_us-gaap_ForeignLineOfCreditMember_65AC3A4F11E0D70BBA0D2F5A03DAC516" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ForeignLineOfCreditMember_65AC3A4F11E0D70BBA0D2F5A03DAC516" xlink:to="lab_us-gaap_ForeignLineOfCreditMember_65AC3A4F11E0D70BBA0D2F5A03DAC516" xlink:type="arc" />
    <link:label id="lab_us-gaap_DomesticLineOfCreditMember_F9493186972144535E6D2F5A03DA281B_terseLabel_en-US" xlink:label="lab_us-gaap_DomesticLineOfCreditMember_F9493186972144535E6D2F5A03DA281B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Domestic Line of Credit [Member]</link:label>
    <link:label id="lab_us-gaap_DomesticLineOfCreditMember_F9493186972144535E6D2F5A03DA281B_label_en-US" xlink:label="lab_us-gaap_DomesticLineOfCreditMember_F9493186972144535E6D2F5A03DA281B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Domestic Line of Credit [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DomesticLineOfCreditMember" xlink:label="loc_us-gaap_DomesticLineOfCreditMember_F9493186972144535E6D2F5A03DA281B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DomesticLineOfCreditMember_F9493186972144535E6D2F5A03DA281B" xlink:to="lab_us-gaap_DomesticLineOfCreditMember_F9493186972144535E6D2F5A03DA281B" xlink:type="arc" />
    <link:label id="lab_us-gaap_LineOfCreditFacilityLineItems_3BC44811C07B8F04435F2F5A03DAB36E_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityLineItems_3BC44811C07B8F04435F2F5A03DAB36E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of Credit Facility [Line Items]</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityLineItems_3BC44811C07B8F04435F2F5A03DAB36E_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityLineItems_3BC44811C07B8F04435F2F5A03DAB36E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_3BC44811C07B8F04435F2F5A03DAB36E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3BC44811C07B8F04435F2F5A03DAB36E" xlink:to="lab_us-gaap_LineOfCreditFacilityLineItems_3BC44811C07B8F04435F2F5A03DAB36E" xlink:type="arc" />
    <link:label id="lab_us-gaap_LineOfCredit_840D8131703FFD29C2FD2F5A03DAFB13_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCredit_840D8131703FFD29C2FD2F5A03DAFB13" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term Line of Credit</link:label>
    <link:label id="lab_us-gaap_LineOfCredit_840D8131703FFD29C2FD2F5A03DAFB13_label_en-US" xlink:label="lab_us-gaap_LineOfCredit_840D8131703FFD29C2FD2F5A03DAFB13" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Line of Credit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_840D8131703FFD29C2FD2F5A03DAFB13" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCredit_840D8131703FFD29C2FD2F5A03DAFB13" xlink:to="lab_us-gaap_LineOfCredit_840D8131703FFD29C2FD2F5A03DAFB13" xlink:type="arc" />
    <link:label id="lab_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_832D6E51242C4ED26FFC2F5A03DA6A3F_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_832D6E51242C4ED26FFC2F5A03DA6A3F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, current borrowing capacity</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_832D6E51242C4ED26FFC2F5A03DA6A3F_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_832D6E51242C4ED26FFC2F5A03DA6A3F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Current Borrowing Capacity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_832D6E51242C4ED26FFC2F5A03DA6A3F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_832D6E51242C4ED26FFC2F5A03DA6A3F" xlink:to="lab_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_832D6E51242C4ED26FFC2F5A03DA6A3F" xlink:type="arc" />
    <link:label id="lab_wst_LineofCreditFacilityAdditionalBorrowingCapacity_FD26EC1EE0A7343815602F5A03DAF493_terseLabel_en-US" xlink:label="lab_wst_LineofCreditFacilityAdditionalBorrowingCapacity_FD26EC1EE0A7343815602F5A03DAF493" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, additional borrowing capacity</link:label>
    <link:label id="lab_wst_LineofCreditFacilityAdditionalBorrowingCapacity_FD26EC1EE0A7343815602F5A03DAF493_label_en-US" xlink:label="lab_wst_LineofCreditFacilityAdditionalBorrowingCapacity_FD26EC1EE0A7343815602F5A03DAF493" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility Additional Borrowing Capacity</link:label>
    <link:label id="lab_wst_LineofCreditFacilityAdditionalBorrowingCapacity_FD26EC1EE0A7343815602F5A03DAF493_documentation_en-US" xlink:label="lab_wst_LineofCreditFacilityAdditionalBorrowingCapacity_FD26EC1EE0A7343815602F5A03DAF493" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Additional borrowing capacity under the credit facility.</link:label>
    <link:loc xlink:href="wst-20190630.xsd#wst_LineofCreditFacilityAdditionalBorrowingCapacity" xlink:label="loc_wst_LineofCreditFacilityAdditionalBorrowingCapacity_FD26EC1EE0A7343815602F5A03DAF493" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_wst_LineofCreditFacilityAdditionalBorrowingCapacity_FD26EC1EE0A7343815602F5A03DAF493" xlink:to="lab_wst_LineofCreditFacilityAdditionalBorrowingCapacity_FD26EC1EE0A7343815602F5A03DAF493" xlink:type="arc" />
    <link:label id="lab_wst_CreditFacilityIsAvailableForSwingLineLoans_90EFE79CC5E6CCBE7C262F5A03DBD982_terseLabel_en-US" xlink:label="lab_wst_CreditFacilityIsAvailableForSwingLineLoans_90EFE79CC5E6CCBE7C262F5A03DBD982" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Credit facility is available for swing-line loans</link:label>
    <link:label id="lab_wst_CreditFacilityIsAvailableForSwingLineLoans_90EFE79CC5E6CCBE7C262F5A03DBD982_label_en-US" xlink:label="lab_wst_CreditFacilityIsAvailableForSwingLineLoans_90EFE79CC5E6CCBE7C262F5A03DBD982" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Credit facility is available for swing-line loans</link:label>
    <link:label id="lab_wst_CreditFacilityIsAvailableForSwingLineLoans_90EFE79CC5E6CCBE7C262F5A03DBD982_documentation_en-US" xlink:label="lab_wst_CreditFacilityIsAvailableForSwingLineLoans_90EFE79CC5E6CCBE7C262F5A03DBD982" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This refers to credit facility is available for swing-line loans</link:label>
    <link:loc xlink:href="wst-20190630.xsd#wst_CreditFacilityIsAvailableForSwingLineLoans" xlink:label="loc_wst_CreditFacilityIsAvailableForSwingLineLoans_90EFE79CC5E6CCBE7C262F5A03DBD982" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_wst_CreditFacilityIsAvailableForSwingLineLoans_90EFE79CC5E6CCBE7C262F5A03DBD982" xlink:to="lab_wst_CreditFacilityIsAvailableForSwingLineLoans_90EFE79CC5E6CCBE7C262F5A03DBD982" xlink:type="arc" />
    <link:label id="lab_wst_CreditAvailableForIssuanceOfLettersOfCredit_2F49473FAC5E6665FDF82F5A03DB5CB5_terseLabel_en-US" xlink:label="lab_wst_CreditAvailableForIssuanceOfLettersOfCredit_2F49473FAC5E6665FDF82F5A03DB5CB5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Credit available for the issuance of letters of credit</link:label>
    <link:label id="lab_wst_CreditAvailableForIssuanceOfLettersOfCredit_2F49473FAC5E6665FDF82F5A03DB5CB5_label_en-US" xlink:label="lab_wst_CreditAvailableForIssuanceOfLettersOfCredit_2F49473FAC5E6665FDF82F5A03DB5CB5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Credit available for the issuance of letters of credit</link:label>
    <link:label id="lab_wst_CreditAvailableForIssuanceOfLettersOfCredit_2F49473FAC5E6665FDF82F5A03DB5CB5_documentation_en-US" xlink:label="lab_wst_CreditAvailableForIssuanceOfLettersOfCredit_2F49473FAC5E6665FDF82F5A03DB5CB5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">this refers to Credit available for the issuance of letters of credit</link:label>
    <link:loc xlink:href="wst-20190630.xsd#wst_CreditAvailableForIssuanceOfLettersOfCredit" xlink:label="loc_wst_CreditAvailableForIssuanceOfLettersOfCredit_2F49473FAC5E6665FDF82F5A03DB5CB5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_wst_CreditAvailableForIssuanceOfLettersOfCredit_2F49473FAC5E6665FDF82F5A03DB5CB5" xlink:to="lab_wst_CreditAvailableForIssuanceOfLettersOfCredit_2F49473FAC5E6665FDF82F5A03DB5CB5" xlink:type="arc" />
    <link:label id="lab_us-gaap_LongTermLineOfCredit_30E08287545F3DD260222F5A03DB0AE9_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermLineOfCredit_30E08287545F3DD260222F5A03DB0AE9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, noncurrent</link:label>
    <link:label id="lab_us-gaap_LongTermLineOfCredit_30E08287545F3DD260222F5A03DB0AE9_label_en-US" xlink:label="lab_us-gaap_LongTermLineOfCredit_30E08287545F3DD260222F5A03DB0AE9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Line of Credit, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermLineOfCredit" xlink:label="loc_us-gaap_LongTermLineOfCredit_30E08287545F3DD260222F5A03DB0AE9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermLineOfCredit_30E08287545F3DD260222F5A03DB0AE9" xlink:to="lab_us-gaap_LongTermLineOfCredit_30E08287545F3DD260222F5A03DB0AE9" xlink:type="arc" />
    <link:label id="lab_wst_LineOfCreditFacilityOutstandingBorrowingsYen_4BA94B2F1C8A0F6DD6442F5A03DB45E4_terseLabel_en-US" xlink:label="lab_wst_LineOfCreditFacilityOutstandingBorrowingsYen_4BA94B2F1C8A0F6DD6442F5A03DB45E4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of Credit Facility outstanding borrowings, Yen</link:label>
    <link:label id="lab_wst_LineOfCreditFacilityOutstandingBorrowingsYen_4BA94B2F1C8A0F6DD6442F5A03DB45E4_label_en-US" xlink:label="lab_wst_LineOfCreditFacilityOutstandingBorrowingsYen_4BA94B2F1C8A0F6DD6442F5A03DB45E4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of credit facility outstanding borrowings, Yen</link:label>
    <link:label id="lab_wst_LineOfCreditFacilityOutstandingBorrowingsYen_4BA94B2F1C8A0F6DD6442F5A03DB45E4_documentation_en-US" xlink:label="lab_wst_LineOfCreditFacilityOutstandingBorrowingsYen_4BA94B2F1C8A0F6DD6442F5A03DB45E4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Line of credit facility outstanding borrowings, Yen</link:label>
    <link:loc xlink:href="wst-20190630.xsd#wst_LineOfCreditFacilityOutstandingBorrowingsYen" xlink:label="loc_wst_LineOfCreditFacilityOutstandingBorrowingsYen_4BA94B2F1C8A0F6DD6442F5A03DB45E4" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_A94AB7194F1866D4BF9A1B7250CB2BA7_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_A94AB7194F1866D4BF9A1B7250CB2BA7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2019 (remaining six months)</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_A94AB7194F1866D4BF9A1B7250CB2BA7_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_A94AB7194F1866D4BF9A1B7250CB2BA7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_A94AB7194F1866D4BF9A1B7250CB2BA7" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_F386B0E0FE4BE38AE27B1B7250CCD977_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_F386B0E0FE4BE38AE27B1B7250CCD977" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2020</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_F386B0E0FE4BE38AE27B1B7250CCD977" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_2F222B55ED674630D9381B7250CCC9DF_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_2F222B55ED674630D9381B7250CCC9DF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2021</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_2F222B55ED674630D9381B7250CCC9DF_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_2F222B55ED674630D9381B7250CCC9DF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Due Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_2F222B55ED674630D9381B7250CCC9DF" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_03719DFE6E3E4687FA7B1B7250CC1CD0_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_03719DFE6E3E4687FA7B1B7250CC1CD0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2022</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_03719DFE6E3E4687FA7B1B7250CC1CD0_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_03719DFE6E3E4687FA7B1B7250CC1CD0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Due Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_03719DFE6E3E4687FA7B1B7250CC1CD0" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_35130F94234A5C4D56081B7250CCA61E_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_35130F94234A5C4D56081B7250CCA61E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2023</link:label>
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_2FD559910DE45A3B33471B7250CCF118_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_2FD559910DE45A3B33471B7250CCF118" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Thereafter</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_2FD559910DE45A3B33471B7250CCF118" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_564F5BAD95FEC4C087361B7250CCB283_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_564F5BAD95FEC4C087361B7250CCB283" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Due</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_564F5BAD95FEC4C087361B7250CCB283" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_2445F82DF8FF95D341E91B7250CD2DBE_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_2445F82DF8FF95D341E91B7250CD2DBE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Less: imputed lease interest</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_2445F82DF8FF95D341E91B7250CD2DBE" xlink:type="locator" />
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    <link:label id="lab_us-gaap_OperatingLeaseLiability_54C01DEAB49ACFFB4B091B7250CDA919_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiability_54C01DEAB49ACFFB4B091B7250CDA919" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total lease liabilities</link:label>
    <link:label id="lab_us-gaap_OperatingLeaseLiability_54C01DEAB49ACFFB4B091B7250CDA919_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiability_54C01DEAB49ACFFB4B091B7250CDA919" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Lease, Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeaseLiability" xlink:label="loc_us-gaap_OperatingLeaseLiability_54C01DEAB49ACFFB4B091B7250CDA919" xlink:type="locator" />
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    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_FECD7EDD24C9726E666E1B7250CD600F_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_FECD7EDD24C9726E666E1B7250CD600F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2019</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_FECD7EDD24C9726E666E1B7250CD600F_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_FECD7EDD24C9726E666E1B7250CD600F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments Due, Next Twelve Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_FECD7EDD24C9726E666E1B7250CD600F" xlink:type="locator" />
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    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_012FED6AA8BA32C725C71B7250CDCF2D_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_012FED6AA8BA32C725C71B7250CDCF2D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2020</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_012FED6AA8BA32C725C71B7250CDCF2D_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_012FED6AA8BA32C725C71B7250CDCF2D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due in Two Years</link:label>
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    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_E0179A80CEE55BB96C011B7250CD345B_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_E0179A80CEE55BB96C011B7250CD345B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2021</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_E0179A80CEE55BB96C011B7250CD345B_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_E0179A80CEE55BB96C011B7250CD345B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due in Three Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_E0179A80CEE55BB96C011B7250CD345B" xlink:type="locator" />
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    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_0921E27F84408DB7EA961B7250CE8742_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_0921E27F84408DB7EA961B7250CE8742" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2022</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_0921E27F84408DB7EA961B7250CE8742_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_0921E27F84408DB7EA961B7250CE8742" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due in Four Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_0921E27F84408DB7EA961B7250CE8742" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_0921E27F84408DB7EA961B7250CE8742" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_0921E27F84408DB7EA961B7250CE8742" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_DBBA68E2DCF25698F0841B7250CE4712_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_DBBA68E2DCF25698F0841B7250CE4712" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2023</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_DBBA68E2DCF25698F0841B7250CE4712_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_DBBA68E2DCF25698F0841B7250CE4712" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due in Five Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_DBBA68E2DCF25698F0841B7250CE4712" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_DBBA68E2DCF25698F0841B7250CE4712" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_DBBA68E2DCF25698F0841B7250CE4712" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_11875715AA79520421B51B7250CE01A6_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_11875715AA79520421B51B7250CE01A6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Thereafter</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_11875715AA79520421B51B7250CE01A6" xlink:type="locator" />
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    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_236F098D12D0FD44393C1B7250CE6165_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_236F098D12D0FD44393C1B7250CE6165" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total</link:label>
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    <link:label id="lab_us-gaap_CostOfGoodsAndServicesSold_8B6521381298191ABAC11B72502F80C2_verboseLabel_en-US" xlink:label="lab_us-gaap_CostOfGoodsAndServicesSold_8B6521381298191ABAC11B72502F80C2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Cost of goods and services sold</link:label>
    <link:label id="lab_us-gaap_CostOfGoodsAndServicesSold_8B6521381298191ABAC11B72502F80C2_label_en-US" xlink:label="lab_us-gaap_CostOfGoodsAndServicesSold_8B6521381298191ABAC11B72502F80C2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cost of Goods and Services Sold</link:label>
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    <link:label id="lab_wst_ForeignCurrencyDenominatedDebtMember_518F43BD5137C7A441F72F6064D576F3_label_en-US" xlink:label="lab_wst_ForeignCurrencyDenominatedDebtMember_518F43BD5137C7A441F72F6064D576F3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Currency, Denominated Debt [Member]</link:label>
    <link:label id="lab_wst_ForeignCurrencyDenominatedDebtMember_518F43BD5137C7A441F72F6064D576F3_documentation_en-US" xlink:label="lab_wst_ForeignCurrencyDenominatedDebtMember_518F43BD5137C7A441F72F6064D576F3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Foreign currency-denominated debt designated as a hedge of our net investments in foreign operations.</link:label>
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    <link:label id="lab_us-gaap_ForwardContractsMember_99DD397359A2508585912F6064D50798_terseLabel_en-US" xlink:label="lab_us-gaap_ForwardContractsMember_99DD397359A2508585912F6064D50798" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Forward Contracts [Member]</link:label>
    <link:label id="lab_us-gaap_ForwardContractsMember_99DD397359A2508585912F6064D50798_label_en-US" xlink:label="lab_us-gaap_ForwardContractsMember_99DD397359A2508585912F6064D50798" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Forward Contracts [Member]</link:label>
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    <link:label id="lab_us-gaap_DebtMember_208B6F8ADE9831B195D32F6064D543AB_terseLabel_en-US" xlink:label="lab_us-gaap_DebtMember_208B6F8ADE9831B195D32F6064D543AB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt EUR Denominated [Member]</link:label>
    <link:label id="lab_us-gaap_DebtMember_208B6F8ADE9831B195D32F6064D543AB_label_en-US" xlink:label="lab_us-gaap_DebtMember_208B6F8ADE9831B195D32F6064D543AB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtMember" xlink:label="loc_us-gaap_DebtMember_208B6F8ADE9831B195D32F6064D543AB" xlink:type="locator" />
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    <link:label id="lab_wst_DebtYenDenominatedMember_D00A4839F700D6265FF92F6064D6AB89_terseLabel_en-US" xlink:label="lab_wst_DebtYenDenominatedMember_D00A4839F700D6265FF92F6064D6AB89" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Yen Denominated [Member]</link:label>
    <link:label id="lab_wst_DebtYenDenominatedMember_D00A4839F700D6265FF92F6064D6AB89_label_en-US" xlink:label="lab_wst_DebtYenDenominatedMember_D00A4839F700D6265FF92F6064D6AB89" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Yen Denominated [Member]</link:label>
    <link:label id="lab_wst_DebtYenDenominatedMember_D00A4839F700D6265FF92F6064D6AB89_documentation_en-US" xlink:label="lab_wst_DebtYenDenominatedMember_D00A4839F700D6265FF92F6064D6AB89" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">An obligation resulting from borrowing money.</link:label>
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    <link:label id="lab_us-gaap_OptionMember_1F7BBAE33142491544C42F6064D6764B_terseLabel_en-US" xlink:label="lab_us-gaap_OptionMember_1F7BBAE33142491544C42F6064D6764B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Options Held [Member]</link:label>
    <link:label id="lab_us-gaap_OptionMember_1F7BBAE33142491544C42F6064D6764B_label_en-US" xlink:label="lab_us-gaap_OptionMember_1F7BBAE33142491544C42F6064D6764B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Options Held [Member]</link:label>
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    <link:label id="lab_us-gaap_IncomeStatementLocationAxis_6190B0765ECC934CEED42F6064D621CB_label_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationAxis_6190B0765ECC934CEED42F6064D621CB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Statement Location [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_6190B0765ECC934CEED42F6064D621CB" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncomeStatementLocationDomain_CE644B02C365B0220CA12F6064D61F45_label_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationDomain_CE644B02C365B0220CA12F6064D61F45" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Statement Location [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_CE644B02C365B0220CA12F6064D61F45" xlink:type="locator" />
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    <link:label id="lab_wst_NetSalesMember_9545E5C138570B9428782F6064D7C4F8_documentation_en-US" xlink:label="lab_wst_NetSalesMember_9545E5C138570B9428782F6064D7C4F8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Net sales member</link:label>
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    <link:label id="lab_us-gaap_InterestExpenseMember_811FBAA520D144D7C91A2F6064D78F36_terseLabel_en-US" xlink:label="lab_us-gaap_InterestExpenseMember_811FBAA520D144D7C91A2F6064D78F36" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest expense [Member]</link:label>
    <link:label id="lab_us-gaap_InterestExpenseMember_811FBAA520D144D7C91A2F6064D78F36_label_en-US" xlink:label="lab_us-gaap_InterestExpenseMember_811FBAA520D144D7C91A2F6064D78F36" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Expense [Member]</link:label>
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    <link:label id="lab_us-gaap_CostOfSalesMember_E5FCBEB0BB009735F4AC2F6064D78187_label_en-US" xlink:label="lab_us-gaap_CostOfSalesMember_E5FCBEB0BB009735F4AC2F6064D78187" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cost of Sales [Member]</link:label>
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    <link:label id="lab_us-gaap_ForeignCurrencyGainLossMember_1CEF2EF92917054BBC6E2F6064D74445_label_en-US" xlink:label="lab_us-gaap_ForeignCurrencyGainLossMember_1CEF2EF92917054BBC6E2F6064D74445" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Currency Gain (Loss) [Member]</link:label>
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    <link:label id="lab_us-gaap_DerivativeLineItems_7976CD9902BB5FBC83572F6064D755A2_label_en-US" xlink:label="lab_us-gaap_DerivativeLineItems_7976CD9902BB5FBC83572F6064D755A2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeLineItems" xlink:label="loc_us-gaap_DerivativeLineItems_7976CD9902BB5FBC83572F6064D755A2" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DerivativeUnderlyingBasis_8F2AA6A275ACAF41F62E2F6064D8E3F9_label_en-US" xlink:label="lab_us-gaap_DerivativeUnderlyingBasis_8F2AA6A275ACAF41F62E2F6064D8E3F9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Underlying Basis</link:label>
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    <link:label id="lab_us-gaap_TreasuryStockShares_82C2DAD1EF1E5877068C1B7251024253_label_en-US" xlink:label="lab_us-gaap_TreasuryStockShares_82C2DAD1EF1E5877068C1B7251024253" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Treasury Stock, Shares</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockShares" xlink:label="loc_us-gaap_TreasuryStockShares_82C2DAD1EF1E5877068C1B7251024253" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TreasuryStockShares_82C2DAD1EF1E5877068C1B7251024253" xlink:to="lab_us-gaap_TreasuryStockShares_82C2DAD1EF1E5877068C1B7251024253" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractWithCustomerAssetNet_C8E76C2E787C0DA8F5642FBB3A64EFF0_periodStartLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerAssetNet_C8E76C2E787C0DA8F5642FBB3A64EFF0" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Contract assets, December 31, 2018</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerAssetNet_C8E76C2E787C0DA8F5642FBB3A64EFF0_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerAssetNet_C8E76C2E787C0DA8F5642FBB3A64EFF0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Asset, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerAssetNet" xlink:label="loc_us-gaap_ContractWithCustomerAssetNet_C8E76C2E787C0DA8F5642FBB3A64EFF0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerAssetNet_C8E76C2E787C0DA8F5642FBB3A64EFF0" xlink:to="lab_us-gaap_ContractWithCustomerAssetNet_C8E76C2E787C0DA8F5642FBB3A64EFF0" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractWithCustomerAssetNet_1718DD6AE821F32183ED2FBB3A673AB3_periodEndLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerAssetNet_1718DD6AE821F32183ED2FBB3A673AB3" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Contract assets, June 30, 2019</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerAssetNet" xlink:label="loc_us-gaap_ContractWithCustomerAssetNet_1718DD6AE821F32183ED2FBB3A673AB3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerAssetNet_1718DD6AE821F32183ED2FBB3A673AB3" xlink:to="lab_us-gaap_ContractWithCustomerAssetNet_1718DD6AE821F32183ED2FBB3A673AB3" xlink:type="arc" />
    <link:label id="lab_wst_ContractwithCustomerAssetIncreaseDecrease_EAAC74295F34D1E94FB92FBB3A675DAC_terseLabel_en-US" xlink:label="lab_wst_ContractwithCustomerAssetIncreaseDecrease_EAAC74295F34D1E94FB92FBB3A675DAC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in contract assets - increase (decrease)</link:label>
    <link:label id="lab_wst_ContractwithCustomerAssetIncreaseDecrease_EAAC74295F34D1E94FB92FBB3A675DAC_label_en-US" xlink:label="lab_wst_ContractwithCustomerAssetIncreaseDecrease_EAAC74295F34D1E94FB92FBB3A675DAC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Asset, Increase (Decrease)</link:label>
    <link:label id="lab_wst_ContractwithCustomerAssetIncreaseDecrease_EAAC74295F34D1E94FB92FBB3A675DAC_documentation_en-US" xlink:label="lab_wst_ContractwithCustomerAssetIncreaseDecrease_EAAC74295F34D1E94FB92FBB3A675DAC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Contract with Customer, Asset, Increase (Decrease)</link:label>
    <link:loc xlink:href="wst-20190630.xsd#wst_ContractwithCustomerAssetIncreaseDecrease" xlink:label="loc_wst_ContractwithCustomerAssetIncreaseDecrease_EAAC74295F34D1E94FB92FBB3A675DAC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_wst_ContractwithCustomerAssetIncreaseDecrease_EAAC74295F34D1E94FB92FBB3A675DAC" xlink:to="lab_wst_ContractwithCustomerAssetIncreaseDecrease_EAAC74295F34D1E94FB92FBB3A675DAC" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractWithCustomerLiability_D6BA47D91C631F8D4D7A2FBB3A670E87_negatedPeriodStartLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiability_D6BA47D91C631F8D4D7A2FBB3A670E87" xlink:role="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:type="resource" xml:lang="en-US">Deferred income, December 31, 2018</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerLiability" xlink:label="loc_us-gaap_ContractWithCustomerLiability_D6BA47D91C631F8D4D7A2FBB3A670E87" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerLiability_D6BA47D91C631F8D4D7A2FBB3A670E87" xlink:to="lab_us-gaap_ContractWithCustomerLiability_D6BA47D91C631F8D4D7A2FBB3A670E87" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractWithCustomerLiability_1A76E5AF5322B1BB2F152FBB3A677B32_negatedPeriodEndLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiability_1A76E5AF5322B1BB2F152FBB3A677B32" xlink:role="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:type="resource" xml:lang="en-US">Deferred income, June 30, 2019</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerLiability" xlink:label="loc_us-gaap_ContractWithCustomerLiability_1A76E5AF5322B1BB2F152FBB3A677B32" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerLiability_1A76E5AF5322B1BB2F152FBB3A677B32" xlink:to="lab_us-gaap_ContractWithCustomerLiability_1A76E5AF5322B1BB2F152FBB3A677B32" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractWithCustomerLiabilityChangeInTimeframePerformanceObligationSatisfiedRevenueRecognized_86D6DE90C968BC8D86FE2FBB3A681998_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityChangeInTimeframePerformanceObligationSatisfiedRevenueRecognized_86D6DE90C968BC8D86FE2FBB3A681998" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in deferred income - decrease (increase)</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerLiabilityChangeInTimeframePerformanceObligationSatisfiedRevenueRecognized_86D6DE90C968BC8D86FE2FBB3A681998_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityChangeInTimeframePerformanceObligationSatisfiedRevenueRecognized_86D6DE90C968BC8D86FE2FBB3A681998" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Liability, Change in Timeframe, Performance Obligation Satisfied, Revenue Recognized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerLiabilityChangeInTimeframePerformanceObligationSatisfiedRevenueRecognized" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityChangeInTimeframePerformanceObligationSatisfiedRevenueRecognized_86D6DE90C968BC8D86FE2FBB3A681998" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerLiabilityChangeInTimeframePerformanceObligationSatisfiedRevenueRecognized_86D6DE90C968BC8D86FE2FBB3A681998" xlink:to="lab_us-gaap_ContractWithCustomerLiabilityChangeInTimeframePerformanceObligationSatisfiedRevenueRecognized_86D6DE90C968BC8D86FE2FBB3A681998" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_ABD1BF43BDA54061B6BC2FBB3A68E344_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_ABD1BF43BDA54061B6BC2FBB3A68E344" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revenue recognized that was included in the deferred income balance</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_ABD1BF43BDA54061B6BC2FBB3A68E344_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_ABD1BF43BDA54061B6BC2FBB3A68E344" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Liability, Revenue Recognized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_ABD1BF43BDA54061B6BC2FBB3A68E344" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_ABD1BF43BDA54061B6BC2FBB3A68E344" xlink:to="lab_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_ABD1BF43BDA54061B6BC2FBB3A68E344" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress_BE161CA21FC8039FD8D72FBB3A683211_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress_BE161CA21FC8039FD8D72FBB3A683211" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress_BE161CA21FC8039FD8D72FBB3A683211_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress_BE161CA21FC8039FD8D72FBB3A683211" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress_BE161CA21FC8039FD8D72FBB3A683211" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress_BE161CA21FC8039FD8D72FBB3A683211" xlink:to="lab_us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress_BE161CA21FC8039FD8D72FBB3A683211" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractWithCustomerTimingOfSatisfactionOfPerformanceObligationAndPayment_7744DC17781F723C20362FBB3A68C13E_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerTimingOfSatisfactionOfPerformanceObligationAndPayment_7744DC17781F723C20362FBB3A68C13E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Receipt of advance cash payment</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerTimingOfSatisfactionOfPerformanceObligationAndPayment_7744DC17781F723C20362FBB3A68C13E_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerTimingOfSatisfactionOfPerformanceObligationAndPayment_7744DC17781F723C20362FBB3A68C13E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Timing of Satisfaction of Performance Obligation and Payment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerTimingOfSatisfactionOfPerformanceObligationAndPayment" xlink:label="loc_us-gaap_ContractWithCustomerTimingOfSatisfactionOfPerformanceObligationAndPayment_7744DC17781F723C20362FBB3A68C13E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerTimingOfSatisfactionOfPerformanceObligationAndPayment_7744DC17781F723C20362FBB3A68C13E" xlink:to="lab_us-gaap_ContractWithCustomerTimingOfSatisfactionOfPerformanceObligationAndPayment_7744DC17781F723C20362FBB3A68C13E" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_769CB42F968477F7418E2FBB3A69D52E_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_769CB42F968477F7418E2FBB3A69D52E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other adjustments</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_769CB42F968477F7418E2FBB3A69D52E_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_769CB42F968477F7418E2FBB3A69D52E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Contract with Customer, Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_769CB42F968477F7418E2FBB3A69D52E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_769CB42F968477F7418E2FBB3A69D52E" xlink:to="lab_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_769CB42F968477F7418E2FBB3A69D52E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractWithCustomerLiabilityCurrent_AA104F4947B6715BD3B22FBB3A69434D_verboseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityCurrent_AA104F4947B6715BD3B22FBB3A69434D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Deferred income, current</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerLiabilityCurrent_AA104F4947B6715BD3B22FBB3A69434D_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityCurrent_AA104F4947B6715BD3B22FBB3A69434D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Liability, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerLiabilityCurrent" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_AA104F4947B6715BD3B22FBB3A69434D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerLiabilityCurrent_AA104F4947B6715BD3B22FBB3A69434D" xlink:to="lab_us-gaap_ContractWithCustomerLiabilityCurrent_AA104F4947B6715BD3B22FBB3A69434D" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractWithCustomerLiabilityNoncurrent_BBF7CD3C0CB0A99FB3682FBB3A69E5EF_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityNoncurrent_BBF7CD3C0CB0A99FB3682FBB3A69E5EF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred income, noncurrent</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerLiabilityNoncurrent_BBF7CD3C0CB0A99FB3682FBB3A69E5EF_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityNoncurrent_BBF7CD3C0CB0A99FB3682FBB3A69E5EF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Liability, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_BBF7CD3C0CB0A99FB3682FBB3A69E5EF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_BBF7CD3C0CB0A99FB3682FBB3A69E5EF" xlink:to="lab_us-gaap_ContractWithCustomerLiabilityNoncurrent_BBF7CD3C0CB0A99FB3682FBB3A69E5EF" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInCustomerAdvances_6FDF92F371E9961BBD6F2FBB3A694368_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInCustomerAdvances_6FDF92F371E9961BBD6F2FBB3A694368" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Customer advance cash payments</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInCustomerAdvances_6FDF92F371E9961BBD6F2FBB3A694368_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInCustomerAdvances_6FDF92F371E9961BBD6F2FBB3A694368" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Customer Advances</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInCustomerAdvances" xlink:label="loc_us-gaap_IncreaseDecreaseInCustomerAdvances_6FDF92F371E9961BBD6F2FBB3A694368" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInCustomerAdvances_6FDF92F371E9961BBD6F2FBB3A694368" xlink:to="lab_us-gaap_IncreaseDecreaseInCustomerAdvances_6FDF92F371E9961BBD6F2FBB3A694368" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_F7A94963AA8345DE3D7B2FDC3E7BBE8B_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_F7A94963AA8345DE3D7B2FDC3E7BBE8B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table]</link:label>
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