Proof Marks On Commercial DWM

[sheepherder]

Originally Posted by DonVoigt

Similar markings are on my Bulgarian 1908 rework that is pretty certainly Erma work from surplus Bulgarians sold in the post war period.

Don, this is the first frame ear I have seen pictures of that shows definitive [& rough!] surface grind marks. My own Luger ears are all lacking any tool marks, whether mill, grinder, or polish. I have to wonder what the Erma people thought needed additional grinding...Unusual to see this pattern of grind marks, it indicates some kind of horizontal grind fixture, rather than a vertical rotary grinder...

[DonVoigt]

Originally Posted by sheepherder

Don, this is the first frame ear I have seen pictures of that shows definitive [& rough!] surface grind marks. My own Luger ears are all lacking any tool marks, whether mill, grinder, or polish. I have to wonder what the Erma people thought needed additional grinding...Unusual to see this pattern of grind marks, it indicates some kind of horizontal grind fixture, rather than a vertical rotary grinder...

Good question, but I have no idea.
Maybe a dent that needed cleaning up?
Another one of those curious "un-knowables".