Jace Sternberger Autographed Green Bay Packers Speed Mini Helmet JSA 30884 The number in the listing title is just an inventory sku for our records and is not the authentication number. This is a Green Bay Packers speed mini helmet that was personally autographed by Jace Sternberger. Includes a certificate of authenticity from James Spence Authentication (JSA) and Denver Autographs.