Michael Mayer Signed Las Vegas Raiders Flash Mini Helmet Beckett 40366 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 Las Vegas Raiders Flash Mini Helmet that was personally autographed by Michael Mayer. Includes a certificate of authenticity from Beckett Authentication Services (BAS) and Denver Autographs.