Hi,
Acquired this one at the Ciney, Belgium show. Sadly no details on where or how it was discovered. It has some interesting details though. The chamber shows signs of a 1920 property mark, as well as a 1917 or 1918 chamber date. Also, the pistol has a standard 9mm barrel but shows the small cut-out for the artillery version. Although one of the images appears to show an Erfurt logo, the DWM logo is pretty obvious on it.
Traces of a division marking are visible on the gripstrap. Sadly too badly corroded to make any sense. The serial number appears to be a short one (3 digit) with the last 2 digits being '11'.
The pistol appears to have malfunctioned. As the pictures show the toggle is partially retracted to the rear and the ejector is broken. There is a spent case (I checked

) in the chamber. I'm working on loosening the receiver and toggle assembly to see if I can extract the case.
This might well be a steel case that jammed.
Also note the hole in the takedown lever. This has been observed on other dug up lugers. Maybe it's just a rust effect.