Three large-sized, signed basketball photos, 2 of '50s Celtic title teams and 1 early '70s shot of Wilt Chamberlain and Kareem Abdul-Jabbar -- meaning the signatures of the top 3 centers of all time are here, Wilt, Kareem and Bill Russell. Celtic '57 and '59 team photos signed by every player including Russell, Bob Cousy, Sam Jones, K.C. Jones, Frank Ramsey, Jim Loscutoff, Tom Heinsohn, and coach Red Auerbach. All signatures in blue marker, averaging 9. Wilt and Kareem pic signed in black and gray markers, also rating 9s. All photos NRMT.