If E75-E76-E79 are the mainstream caramel sets of the prewar era, then E77 represents a substantial step up in rarity from those sets. Issued by the American Caramel Company, this set has 24 cards including two wrestlers (Gotch and Hackenschmidt). There is one significant variation, though it is not fully catalogued: at least some of the horizontal cards can be found with the name at the left or at the right of the image. The cards with name at right are the scarcer of the two varieties. This set includes the base cards and two of the left side variations: Abe Attell and Owen Moran. If you can run down the Benny Kaufman and Leo Houck variations you would have a master set of known cards. The condition breakdown of the set is interesting. As you can see, most cards are solid mid-grade examples and are currently #1 on the SGC registry. The breakdown is as follows: SGC 80 Erne, Houck, Langford SGC 70 Al Kaufman, Attell, Lewis, O'Brien SGC 60 Benny Kaufman, Burns, Flynn, Hackenschmidt, Johnson, Kaufman and Johnson, Nelson and Wolgast, Wolgast SGC 50 Coulon, Ferguson, McFarland, Moran (L), Moran (R), Wolgast and Nelson SGC 40 Driscoll, Gotch, Ketchell SGC 40 Papke SGE 10 Atell