Dak Prescott & Ceedee Lamb Signed Cowboys Authentic Flash Helmet BAS 37793 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 flash speed helmet that was personally autographed by Dak Prescott and Ceedee Lamb. Includes a certificate of authenticity from Beckett Authentication Services (BAS) and Denver Autographs.