Grant Gelt Signed 2018 Topps Archives Sandlot Trading Card Bertram BAS 39246 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 trading card that was personally autographed by Grant Gelt. This has been professionally slabbed by Beckett Authentication Services (BAS) and includes a certificate of authenticity from Denver Autographs.