Trevon Diggs Autographed Dallas Cowboys Lunar Mini Helmet JSA 36836 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 Dallas Cowboys lunar speed mini helmet that was personally autographed by Trevon Diggs. Includes a certificate of authenticity from James Spence Authentication (JSA) and Denver Autographs.