This is an Official Wilson NBA Game Ball Basketball that has been hand signed by members of the 1979-80 Seattle Supersonics Team. Signatures include Lenny Wilkens, Jack Sikma, Fred Brown, Dennis Johnson, Lonnie Shelton, Gus Williams, Vinnie Johnson, John Johnson, Wally Walker, James Bailey, Tom LaGarde, Les Habegger, Paul Silas and one other. This item has been certified authentic by Beckett Authentication (BAS) and comes with their tamper-proof hologram and matching full-page certificate of authenticity.