This full size helmet has been personally hand-signed by Gunner Olszewski. The helmet is signed in blue ink. It is officially licensed by the National Football League and comes with an individually numbered, tamper-evident hologram from JSA and matching COA. The item was signed on December 14, 2020. 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.