Michael Mayer Signed Notre Dame Fighting Irish Authentic Speed Helmet BAS 39138 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 Notre Dame Fighting Irish full size authentic speed helmet that was personally autographed by Michael Mayer with Play Like a Champion inscription. Includes a certificate of authenticity from Beckett Authentication Services (BAS) and Denver Autographs.