This Riddell San Francisco 49ers mini helmet has been personally hand-signed by the San Francisco 49ers quarterback Y.A. Tittle with the inscription "HOF 71." It is officially licensed by the National Football League and comes with an individually numbered, tamper evident hologram from Fanatics Authentic. To ensure authenticity, the hologram can be reviewed online. This process helps to ensure that the product purchased is authentic and eliminates any possibility of duplication or fraud.