Description:Wilt Chamberlain and Bill Russell auto. official NBA basketball. Spalding official leather NBA game ball features highly coveted signature combo of Chamberlain and Russell, whose legendary head-to-head clashes in the 1950's-'60's helped redefine professional basketball. Each has added a large signature in gold sharpie. Signatures rate 10 out of 10. Ball itself is in like-new condition. Includes LOA from JSA: NM-MT