Joe Montana Dak Prescott Signed 2017 Classics Idolized 10 Auto BAS 39755 The number in the listing title is just an inventory sku for our records and is not the authentication number. The item pictured is a stock photo unless otherwise noted. This is a slabbed 2017 Classics Idolized Grade 10 Autograph Trading Card that was personally autographed by Dak Prescott and Joe Montana. Includes a certificate of authenticity from Beckett Authentication Services (BAS) and Denver Autographs.