Similar to the E90-designated sets, Jefferson Burdick identified three separate E91 American Caramel issues. They are known to collectors as E91-A, E91-B, and E91-C.
Each set includes a total of 33 cards and contains only players from certain teams. Both the E91-A and E91-B sets feature players from Chicago, New York, and Philadelphia. The E91-C release focused on players from Boston, Pittsburgh, and Washington.
Card fronts featured colored pictures of the players, though they were generic images and often didn’t look like the actual player identified on the card. Backs were helpful in that they identified a player checklist for the set.
All three sets have stars and Hall of Famers. Both the E91-A and E91-B sets are anchored by Christy Mathewson and Eddie Plank. The E91-C set is arguably the most star-studded with Honus Wagner, Walter Johnson, Smoky Joe Wood, and Tris Speaker, along with some other Hall of Famers as well.