Justin Jefferson Signed Minnesota Vikings SpeedFlex Helmet BAS 42718 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 Minnesota Vikings Full Size Authentic SpeedFlex Helmet that was personally autographed by Justin Jefferson. Includes a certificate of authenticity from Beckett Authentication Services (BAS) and Denver Autographs.