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Mark McGwire Signed Oakland Athletics Envelope BAS Y19900
Mark McGwire Signed Oakland Athletics Envelope BAS Y19900
Mark McGwire Signed Oakland Athletics Envelope BAS Y19900

Mark McGwire Signed Oakland Athletics Envelope BAS Y19900

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Featured is a Mark McGwire signed Oakland Athletics envelope. This envelope was hand signed by Mark McGwire and authenticated by Beckett authentication services. Included with the item is a Beckett hologram and certificate of authentication. 

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