Calvin Johnson Autographed Detroit Lions Speedflex Helmet Beckett 44030 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 Detroit Lions Speedflex Full Size Helmet that was personally autographed by Calvin Johnson. Includes a certificate of authenticity from Beckett Authentication Services (BAS) and Denver Autographs.