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Don McMahon Autographed 1972 Topps Card #509 San Francisco Giants Beckett BAS #12306456 MP-Olympics A professional-style football jersey autographedThis is a 1972 Topps Card #509 that has been hand signed by Don McMahon. There is a minor imperfection in the signature as shown. It has been certified authentic by Beckett Authentication (BAS) and comes encapsulated in their tamper proof holder.