Dak Prescott, Elliott & Lamb Signed Cowboys Authentic Speed Helmet BAS 37794 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 Dallas Cowboys full size authentic speed helmet that was personally autographed by Ezekiel Elliott, Dak Prescott, and Ceedee Lamb. Includes a certificate of authenticity from Beckett Authentication Services (BAS) and Denver Autographs.