This is a Riddell Oklahoma Sooners full size speed replica helmet autographed by quarterback, Dillon Gabriel. He signed this helmet boldly with a white paint pen, and has been professionally authenticated by one of the professions leading 3rd party authentication services - JSA (James Spence Authentication). The item will come with the certificate of authenticity (COA) from JSA that matches the certificate number on the sticker they placed on the item. Visit their website and enter your certificate number for signature verification!