Von Miller Signed Denver Broncos Authentic Speed Flex Helmet SB MVP JSA 30039 The number in the listing title is just an inventory sku for our records and is not the authentication number. This is a Denver Broncos full size authentic speed flex helmet that was personally autographed by Von Miller with SB 50 MVP inscription. Includes a certificate of authenticity from James Spence Authentication (JSA) and Denver Autographs.