This jersey has been personally hand-signed by William Karlsson with the inscription "1st VGK Hat Trick 12/31/17." It is officially licensed by the National Hockey 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. This is a limited edition of 17.