A total of 11 members of baseball's exclusive 500 Home Run club have signed this crisp, white ball. Official American League (Brown) ball is in NM condition with bold stampings and autographs including: Mantle (ss), Williams (ss), Aaron, Mays, Banks, McCovey, Killebrew, R. Jackson, F. Robinson, Schmidt, and Mathews. Signatures in blue ballpoint ink average 7-8/10; a marvelous keepsake from baseball's elite.