1921Reichswehr Unit Marked DWM

[Ron Smith]

This came in yesterday. I got it from a collector who is selling off his collection. Because of alittle glitch we had concerning a 1937 S/42 on GB. He offered me this at a greatly reduced price. Needless to say I took the offer. A 1921 unit marked DWM in approx. 95%. All matching except, un-numbered grips, and transitional wood bottom, blued tube mag. Firing pin and the hold-open, which may be armorers replacement, also match.Since I haven't been able to locate a copy of Weimar Lugers. I need help filling in the gaps. I'm assuming this is a Reichswehr Army issued pistol, considering the unit marks.
All opinions,eagerly accepted and welcome.
Thanks! Ron

Sorry Folks, I just realized I inadvertently put the wrong grips on it. These are off of my 1936 S/42. In the dreary confines of my laboratory. I got the grips mixed up. Thought these looked familiar.Correct grips are similar cond. Not as much figure in the wood.

The unit marks are struck over a previous mark. A faint 15 can be seen under the R. a different style 5 under the 5 in 15, and a different style 3 under the 3. And a slanted colin between 15 and / .