Welcome to Net54, Brian. Although I was present at Yankee Stadium for Game 2 of the 1957 World Series and thus have first-hand knowledge of prehistoric Milwaukee baseball, I can't be of much help to you as far as specific pre-war items go. However I would like to draw your attention to this link to a similar Net54 thread from last year. The borchertfield.com reference is definitely worth checking out-it's a pretty amazing blog about the old Brewers-and John Effenheim's photo site has lots of cards.
http://tinyurl.com/ycc46oa
