Feller is listed for a variant in the H&S Super set. But before that Dick Gilkeson and Richard Dingman had both included the Feller in their variations compilations from the 80s and 90s. It is sometimes listed a clear or hazy , or with or without slats. There is not doubt the slats in the background are more prominent on some cards and almost completely faded on others. I do not think I have seen a version where every trace of the slats is gone.
Like the red versus orange background Crandall, the difference may be in the eye of the beholder
