You'll rarely find a HOFer-signed ball in as immaculate a condition as this snow white bauble signed by two popular Tiger HOFers, Hammerin' Hank Greenberg and Charlie Gehringer, each of whom signed the ball at Tiger Stadium on the day their numbers were retired. Greenberg, one of the most prolific sluggers ever, left a smooth and jaunty marker on the sweet spot in dark blue felt tip, while "The Mechanical Man" laid down a precise and elegant autograph on a side panel in black ballpoint. Gehringer must be classified as a perfect 10, Greenberg a 9 only because of a slight smudge on the "k" in Hank. OAL (MacPhial) ball is NRMT with nearly invisible wear to the left of the MacPhail stamp.