Description:Roberto Clemente and Bill Mazeroski, et. al. autographed baseball c.1960s. Spalding W.Giles Official National League baseball has been signed on the side panel by Bill Mazeroski and Roberto Clemente. Additional signatures include Roy Face, Matty Alou, and a secretarial Harry Walker. Blue ink signatures range from 8 to 8/9 out of 10 and appear on cream colored ball with bold League stampings and little to no mentionable wear. Includes auction LOA from JSA: NM