I can't really tell you if if there's any clubhouse sigs here, but I can tell you that based on Dressen and Podres being on the ball together that this would be a 1953 ball. Brooklyn balls are known for the skilled signings of Mr. Charlie "The Brow" DiGiovanna. Charlie was the home batboy for the Dodgers and signed alot for the players. Here's a link to some info about him that might give you some background.
http://www.psacard.com/articles/arti...universeid=314