The "key" card of virtually every issue between 1907 and 1921 is that of Ty Cobb.  Thought the 1921 E121 American Caramel issue also contains Babe Ruth cards that would qualify is the issue's "keys," the Cobb remains important, and it also is one of the Georgia Peach's more popular cardboard issues, due to its relative affordability and his portrayal as the team's manager.  Presented here is an attractive example, exhibiting wear at the corners and edges, with a relatively clean image area, centered to the right.  The reverse is clean.