Harmon Killebrew Gem Mint 10 Autograph on a Mint 2002 Official All-Star Game Ball. Lot 72. Harmon Killebrew Gem Mint 10 Autograph on a Mint 2002 Official All-Star Game Ball. Authenticated by Kevin Keating. Killebrew signed the sweet spot. Winning Bid $138. Back to List Winning Bid $138 Back to List