Adrian Peterson Autographed Oklahoma Sooners F/S Speed Authentic Helmet w/ Inscription - Beckett Witness *Silver This is a hand autograph of Adrian Peterson of the Oklahoma Sooners on a Riddell Football Full Size Speed Authentic Helmet and inscribed with "Boomer Sooner". This item has a Beckett Witness Authentication, which comes with a Beckett numbered sticker and a matching Certificate of Authenticity. You can view this item on the Beckett website, 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 and brand new in great shape.