Joe Montana Autographed 1991 Pro Set Platinum Card #139 San Francisco 49ers Auto Grade Gem Mint 10 Beckett BAS #16170545 Premium-FB Billy Williams and authenticated by

Billy Williams and authenticated by a top 3rd party authentication company

Authentic Signature: The jersey comes with a certified authentic signature from Trevon Diggs

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Joe Montana Autographed 1991 Pro Set Platinum Card #139 San Francisco 49ers Auto Grade Gem Mint 10 Beckett BAS #16170545 Premium-FB Billy Williams and authenticated byThis is a 1991 Pro Set Platinum Card #139 that has been hand signed by Joe Montana. The condition of the signature was graded a Gem Mint 10 by Beckett BAS. It has been certified authentic by Beckett Authentication Services (BAS) and comes encapsulated in their tamper proof holder.