Adrian Peterson Signed Oklahoma Sooners Authentic Speed Helmet Beckett 38221 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 Oklahoma Sooners full size authentic speed helmet that was personally autographed by Adrian Peterson with 3x 1st Team All Big 12 and 2004 All American inscriptions. Includes a certificate of authenticity from Beckett Authentication Services (BAS) and Denver Autographs.