Literally the signed sweet spot of a Joe DiMaggio autographed ball. Solid signature in blue ballpoint. Card is NM+.
Interestingly, the note on the back (printed on the ball) congratulates you for getting this Babe Ruth autograph! we have located several other of this card and the backs are all correct. We have no idea what would cause this fluky error but it is interesting! There was a 1 of 1 Babe Ruth Autograph card in this set, and the back on it is correct.