Could anyone help identify these stampings?
 

I have a 1918 luger (brother-in-laws) that he picked up a few years ago. The luger is 100% matching, but there is an import marking on the barrel and the trigger plate had a number etched on it with an electic pen (now removed). In addition, the finish was a disaster. He asked me to refinish it and hot blue it for him. I have stripped down the frame and barrel and notice there are 5 markings on the receiver/slide right side. Can anyone identify these for us?

Thanks,
Mark

These are German military proofs found on DWM Lugers manufactured 1914-1918.

The SU4 proof I am not sure about. Perhaps a Nazi Era proof. Someone will be along that knows.

That is the one that puzzles me the most.

see Dwight's second post (02-14-2005, 07:29 PM) in this thread...

http://forum.lugerforum.com/showthre...&highlight=su4

Mark, Costanzo's Book "World of Lugers" identifys the E/SU4 as a SIMSON/ULBRICHT proof. The 4 is a contract number.

Hope this helps a little!

Mark, Judging from the SWE/SU4, I would say that this would be an early nazi era (1933?) Simson rework of some type. Most probably a barrel replacement. You should be able to tell by the markings in the barrel. TH

I think it is an abbreviation of the early Weimar time: Spandau. We know also SU25 or SU50. Often the first and last letter of the word were used for abbreviation during this time.

Not all of them are proof marks. The three on the left having a Crown/Gothic letter are acceptance stamps. They were placed there by an inspector after having passed an inspection procedure. The eagle to the right is the firing proof. It was placed there, on the barrel and the breechblock after successful proof firing.
Bob