Ulm proof house?
 

At a recent gun show I ran across a luger with the Ulm proof -antler on the left front of the receiver. What is the significance of this proof on a luger? The dealer told me he thought it was a rework, that was probably used for police. The gun was a DWM with a double date -1920 - 1918, if I remember correctly. There was no sear safety and no magazine safety on the pistol.
I am curious as to why the pistol would have this peculiar proof.
Any information would be appreciated.
Thanks, barr

Well, if it has an Ulm proof, it was proofed in Ulm. As simple as that.

In Germany, when certain repairs are made, the gun must be reproofed. Maybe some post war repair was done to the pistol by a previous owner or gun smith. Normally speaking, there would also be a republic eagle / N on the pistol's receiver, toggle and barrel after a reproof.

Ulm Proof.
 

Thanks Vlim,
Evidently then this was a single incident for a repair and not part of a mass rework. That's interesting. I believe the gun did have the E/N proof on it as well.
Appreciate it, barr.