This basketball has been personally hand-signed by Dirk Nowitzki with the inscription "2011 NBA CHAMPS." It is officially licensed by the National Basketball Association 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. Made in the USA. Personally Autographed by Dirk Nowitzki. Fanatics Authentic Presented by Mounted Memories. Includes tamper-evident hologram to ensure authenticity. Officially licensed. This product is guaranteed authentic and includes a Fanatics Certificate of Authenticity and an accompanying tamper-evident Fanatics Hologram. Â Â Includes certificate of authenticity and hologram! Nowitzki's signature is guaranteed authentic through the Fanatics hologram system.