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In page R28 (New York City Subway car):

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After retirement, all but two pairs were stripped to help create the Redbird Reef.[1] The two pairs that were not scrapped were preserved: * Cars 7924-7925 are still on the New York City Subway property; this pair was previously used for work service at the Unionport Yard until July 2013, when they were moved to the Concourse Yard for storage and preservation, along with R26s 7774-7775 and R29s 8678-8679.