Three old shell holders turned up in a box of stuff. They are basically the same size and shape of the Herter's shell holders that use set screws. The difference is that the shank that slips in the ram doesn't have a groove for the set screws, just a straight shank and the priming holes are a different size. There is one dimple in the front of the holder for a set screw. On a Herters press the two set screws are in the side of the ram.
Wells, Lachmiller ? I can't find anything.