Game Used Barnstorming Baseball Question
 

I'm not sure if anyone here has a lot of information or knowledge in this subject but I figured i'd ask.

I'm curious to what types of balls were used during Barnstorming games of the 20's and 30's. Was it standard to use OAL or ONL baseballs? I've seen some different potential "game used" balls with Rawlings Official League etc.

Thanks in advance!