This 16x20 Photo from the 1989 All Star Game has been personally hand-signed by BOTH Two Sport Super Star Bo Jackson & Yankee Legend, Don Mattingly. This item was signed in the presence of and witnessed by a representative of Beckett Authentication. It comes with an individually numbered, tamper evident sticker from Beckett which can be reviewed online to ensure authenticity. This process helps to ensure that the product purchased is authentic and eliminates any possibility of duplication or fraud.