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Frank WakefieldWhat you'd really find helpful is that great work that Mr. Lipset published about 30 years ago. If you don't have one, you NEED one if you're looking at figuring out the Cracker Jack cards.
Encyclopedia of Baseball Cards, Volume 2, Early Gum and Candy Cards, by Lew Lipset.
With that, you can figure out who's in the 1914 set that isn't in the 1915 set, and conversely. More happened than merely adding 32 cards. It lists the team affiliations. While the prices are dated, the information that Mr. Lipset sets out leaves modern catalogs in the dust. We owe him a debt of gratitude for putting this Encyclopedia, as well as his other two, together and publishing them.