Purple People Eaters Signed Vikings Authentic Lunar Helmet 4 Sigs Beckett 37286 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 Minnesota Vikings full size authentic lunar speed helmet that was personally autographed by the 4 members of the Purple People Eaters: Carl Eller, Jim Marshall, Alan Page and Gary Larsen. Includes a certificate of authenticity from Beckett Authentication Services (BAS) and Denver Autographs.