Clay Matthews Autographed Cleveland Browns 75-05 Speed Mini Helmet- Prova *Black This is a hand autographed Helmet of Clay Matthews of the Cleveland Browns. This is a Riddell Football 75-05 Speed Mini Helmet. This item has a Prova Authentication, which comes with a Prova numbered sticker hologram for verification. You can view this item on the Prova website. 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.