Riddell Ohio State Buckeyes Mini-Helmet has been hand-signed in black felt-tip pen by Joey Bosa (San Diego Chargers). The autograph includes an official James Spence Authentication (JSA) hologram and matching COA for authenticity purposes. The signing of this item was witnessed by JSA.Authentication: JSA COA Shop our ebay store / Friendly Confines Collectibles for thousands of different autographed jerseys