Joe Montana Autographed 1988 Topps #4 Trading Card BAS 10 Slab 34632 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 1988 Topps trading card that was personally autographed by Joe Montana. This has been professionally slabbed by Beckett Authentication Services (BAS) and includes a certificate of authenticity from Denver Autographs.