The Old Professor won two World Series titles as a player with the Giants and seven more as a manager of the Yankees. Here he signs the sweet spot of this "Aetna Life's Hall Of Fame" baseball in 8.5/10 black ink. The ball has toned and there is a slight abrasion which intersects with the "a" in "Casey" but these distractions do not detract significantly from the overall aesthetics and display appeal of this exemplar. JSA LOA.

Addendum: Abrasions on the entire western panel suggest a signature was obscured for removal purposes.