You will find these un-labeled Waverly open gear tuning machines on 1940's guitars from Gretsch and Martin guitars from the period, others as well.
This set includes the original bushings and mounting screws.
One tuning machine is a little brighter than the others. It could be from a different set originally, which I think is the case. One bushing is very slightly different from the others as well. They appear to be all of the same era for sure, with only the patina on the one tuner differing, and a very slight difference in the profile of one bushing.