James Cook Autographed Buffalo Bills Speed Mini Helmet-Prova *Black This is a James Cook of the Buffalo Bills hand autographed Riddell Football Speed mini helmet. This item has a Prova Authentication, which comes with a numbered sticker hologram and a COA. You can view this item on the Prova website and it shows when and where the item was signed. It was signed either at a public autograph appearance or a private signing. This is a stock photo of the item. Although you may not receive this exact item, the item you receive is virtually identical, brand new, and in great shape.