Baker Mayfield & Nick Chubb Browns Signed Authentic Speed Helmet BAS 34673 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 Cleveland Browns full size authentic speed helmet that was personally autographed by both Baker Mayfield and Nick Chubb. Includes a certificate of authenticity from Beckett Authentication Services (BAS) and Denver Autographs.