This USC Trojans Riddell full-size authentic helmet has been hand signed by 5 USC Heisman Trophy winners: Carson Palmer, Matt Leinart, Marcus Allen, Mike Garrett and Charles White. This item comes with a certificate of authenticity (COA) from Beckett Authentication Services and was signed in the presence of one of their representatives. You will receive a serial-numbered COA along with a matching serial-numbered sticker on the helmet. A Tristar Authentic serial-numbered hologram is also on the helmet.Item pictured may not be the exact item you will receive. It will be similar quality, and we guarantee your satisfaction.