Mike Alstott Signed Purdue Boilermakers Black Mini Helmet Beckett 42047 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 Black speed mini helmet that was personally autographed by Mike Alstott. Includes a certificate of authenticity from Beckett Authentication Services (BAS) and Denver Autographs.