DOUBLE X!!!...Jimmy Foxx autographs are some of the most coveted in the hobby, as the Beast is widely considered one of the greatest ballplayers of all time. Offered is a portion of a 1964-date HOF Yellow Plaque postcard of Jimmy Foxx signed by “Jimmie” Foxx. Foxx has signed in blue fountain pen along the cut back of the original postcard, and PSA/DNA has deemed it GEM MINT. Spectacular Double X mark.