The Louisville Slugger bat has been personally hand signed by former New York Yankees catcher Yogi Berra. It comes encased in a beautiful black framed bat case that has been laser engraved with the Yankees team logo. It is officially licensed and authenticated by Major League Baseball and comes with an individually numbered; tamper evident hologram from Mounted Memories. 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.