Baker Mayfield Autographed Oklahoma Sooners F/S AMP Helmet w/HT - Beckett W Auth *White This is a hand autograph of Baker Mayfield of the Oklahoma University Sooners on a Riddell Football Full Size AMP Speed Replica Helmet. This item is inscribed with HT 17. This item has a Beckett Witnessed Authentication, which comes with a numbered sticker and a matching Beckett Certificate of Authenticity. You can view this item on the Beckett Authentication 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 and brand new in great shape.