Tony Dorsett Signed Dallas Cowboys 1978 Topps Trading Card BAS Slab 29564 The number in the listing title is just an inventory sku for our records and is not the authentication number. This is a 1978 Topps #315 trading card that was personally autographed by Tony Dorsett. This was slabbed by Beckett Authentication Services (BAS) and includes a certificate of authenticity from Denver Autographs.