Toby Gerhart Autographed Stanford Cardinals Full Sizenbsp;Riddellnbsp;Replica Helmet with 3522 YDS and 42 TDs Insc. To ensure this items authenticity This Riddellnbsp;full size helmetnbsp;has been hand signed bynbsp;Toby Gerhartnbsp;during a recent private signing event heldnbsp;February 27 2010 courtsey of The Sports Mix. With your purchase you will receive a Certificate of Authenticity COA from The Sports Mixnbsp;and a serial numbered tamper evidentnbsp;hologram that has been placed on the rear of the helmet.nbsp;Thisnbsp;authentication processnbsp;allows the owner of this item to check a corresponding online authenticity verification database by logging onto their website and entering the serial number found on the hologram...eachnbsp;item also comes with a photo ofnbsp;Toby Gerhartnbsp;signing thenbsp;item 100 guaranteeing the authenticity of this item for life.