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Not sure if anyone cares, but I found a couple of pictures of Johnny Callison's game winning homer at the 1964 All Star Game. Roberto Clemente is in the background. Granted, they are in black and white, but it looks like a good match for the 1970 card. Surely not definitive, but I think we have a winner. Wow, didn't realize Topps reached that far back in their archives for shots.