Experience a unique chance to own a noteworthy item from the world of baseball. The 2003 Topps Gallery baseball card, numbered #104 and autographed by Mark Prior himself, is available now. This authentic card not only features an on-card signature, but also comes encased in protective slabbing. A true collector's item, this vintage card from the 2003 season is officially licensed by Topps. Authentication services from Beckett Authentication Services (BAS) have verified the autograph with authentication number 00016507861. Don't miss the opportunity to add this rare piece to your sports trading card collection. The autograph is in blue Sharpie. Mark Prior Autographed Chicago Cubs 2003 Topps Total Baseball Card #104. Encapsulated and authenticated by the experts at Beckett Authentication Services (BAS). Certificate Number 00016507861.