Posted By:
Andy BaranScott,
Your Frank Baker card is from 1921, not 1915. Standard Buscuit backs exists for Sporting News cards, Collins McCarthy Cards, and E121 American Caramels. Since your card does not have a number on the front, this means that it is related to the 1921 E121 American Caramel Set. I believe that it is the same image that is used on the Collins McCarthy card. Based on the scan, I would grade the card at about Ex. I hope this helps.