Darius Slay Signed Philadelphia Eagles Speed Mini Helmet Beckett 42386 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 Purdue Boilermakers Gold speed mini helmet that was personally autographed by Mike Alstott. Includes a certificate of authenticity from Beckett Authentication Services (BAS) and Denver Autographs.