I'm working on a new library card right now while I wait for the wallet to get back in stock. Looking on google at old library cards most of them I've seen through a search only go back to the 50's which makes me wonder, and maybe some of those who are alot older then me and remember, if there were any library cards back in the 30's. Cause remember the article is from 1935 saying chester was missing so he would have had to have it in the late 20's early 30's.
Otherwise do we really know what else goes in the wallet? I just ran through the movie again, when the fratellis find chester and the one rummages through the wallet and you see the scraps of paper, but thats about all you see.