This is a Basketball that has been hand signed by 12 members of the 1978-79 NBA Champions Seattle Supersonics. Signatures include Gus Williams, Jack Sikman, Paul Silas, Lenny Wilkens, Fred Brown, Lonnie Shelton, Tom LaGarde, Dennis Johnson, Dick Snyder, Joe Hassett and Wally Walker.A It has been certified authentic by Beckett Authentication (BAS) and comes with their sticker and matching full page certificate of authenticity.