Bob Griese, former All-American quarterback for the Boilermakers, has hand signed this Purdue full-size throwback helmet at a private signing. This helmet is a reproduction of the style Griese wore with the suspension inside. This item comes with a certificate of authenticity (COA) from JSA - James Spence Authentication 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. The authenticity can be verified online by entering the serial number.Item pictured may not be the exact item you will receive. It will be similar quality, and we guarantee your satisfaction.