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        <RelatedOrExemptFuncIncomeAmt>0</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
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      <OtherRevenueTotalAmt>0</OtherRevenueTotalAmt>
      <TotalRevenueGrp>
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        <RelatedOrExemptFuncIncomeAmt>0</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>1540</ExclusionAmt>
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      <GrantsToDomesticOrgsGrp>
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      <GrantsToDomesticIndividualsGrp>
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      <CompCurrentOfcrDirectorsGrp>
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      <OtherExpensesGrp>
        <Desc>Restoration fees and supplies</Desc>
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        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>126955</ManagementAndGeneralAmt>
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      <CashNonInterestBearingGrp>
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        <EOYAmt>58482</EOYAmt>
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        <EOYAmt>79177</EOYAmt>
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      <TotalAssetsGrp>
        <BOYAmt>163013</BOYAmt>
        <EOYAmt>137659</EOYAmt>
      </TotalAssetsGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrgDoesNotFollowFASB117Ind>X</OrgDoesNotFollowFASB117Ind>
      <RtnEarnEndowmentIncmOthFndsGrp>
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        <EOYAmt>137659</EOYAmt>
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      <TotalNetAssetsFundBalanceGrp>
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      <TotLiabNetAssetsFundBalanceGrp>
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        <EOYAmt>137659</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <ReconcilationRevenueExpnssAmt>-25355</ReconcilationRevenueExpnssAmt>
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <AccountantCompileOrReviewInd>false</AccountantCompileOrReviewInd>
      <FSAuditedInd>false</FSAuditedInd>
      <FederalGrantAuditRequiredInd>false</FederalGrantAuditRequiredInd>
    </IRS990>
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      <SupportedOrganizationsCnt>0</SupportedOrganizationsCnt>
      <GiftsGrantsContriRcvd170Grp>
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        <CurrentTaxYearMinus3YearsAmt>113125</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>147221</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>128914</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>223364</CurrentTaxYearAmt>
        <TotalAmt>927819</TotalAmt>
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      <TotalCalendarYear170Grp>
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        <CurrentTaxYearMinus2YearsAmt>147221</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>128914</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>223364</CurrentTaxYearAmt>
        <TotalAmt>927819</TotalAmt>
      </TotalCalendarYear170Grp>
      <SubstantialContributorsTotAmt>518278</SubstantialContributorsTotAmt>
      <PublicSupportTotal170Amt>409541</PublicSupportTotal170Amt>
      <GrossInvestmentIncome170Grp>
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        <TotalAmt>3544</TotalAmt>
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      <GrossReceiptsRltdActivitiesAmt>931363</GrossReceiptsRltdActivitiesAmt>
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      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
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    <IRS990ScheduleB documentId="ScheduleB" documentName="IRS990ScheduleB">
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        <ContributorBusinessName>
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        </ContributorBusinessName>
        <ContributorUSAddress>
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          <AddressLine2>RESTRICTED</AddressLine2>
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          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
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        <AssetsIncludedAmt>0</AssetsIncludedAmt>
      </HeldWorksArtGrp>
      <CollectionUsedPubExhibitionInd>X</CollectionUsedPubExhibitionInd>
      <SolicitedAssetsSaleInd>false</SolicitedAssetsSaleInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part III, Line 4</FormAndLineReferenceDesc>
        <ExplanationTxt>Mack Trucks Historical Museum is open to the general public and maintains a continuous and bona fide program for solicitation of funds from the general public via donations from visitors to the museum. The Mack Historical Museum is the repository of historical documents and artifacts from Mack's long and storied history as the leading American truck manufacturer and world-renowned brand name. The collection and curators at the Mack Museum connect Mack enthusiasts and casual visitors alike to the rich legacy of "The Greatest Name in Trucks."</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleO documentId="ScheduleO" documentName="IRS990ScheduleO">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part VI, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>Final form 990 is submitted for review and approval by principal officer. Additionally, all financial statements used in preparation of form 990 are reviewed and approved by officers/ board.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part VI, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>Final form 990 is submitted for review and approval by principal officer. Additionally, all financial statements used in preparation of form 990 are reviewed and approved by officers/ board.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>