Tony Gonzalez Signed Kansas City Chiefs 1997 Topps Chrome Card BAS Slab 28917 The number in the listing title is just an inventory sku for our records and is not the authentication number. This is a 1997 Topps Chrome #24 trading card that was personally autographed by Tony Gonzalez. This was slabbed by Beckett Authentication Services (BAS) includes a certificate of authenticity from Denver Autographs.