Stefon Diggs Autographed Buffalo Bills F/S 2011-20 Speed Helmet Beckett 39769 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 Buffalo Bills full size 2011-20 speed replica helmet that was personally autographed by Stefon Diggs. Includes a certificate of authenticity from Beckett Authentication Services (BAS) and Denver Autographs.