There is no GERMANY stamp on the gun, and all the small parts are serialized, which suggests a military gun. The grips appear to be original, one has the last two digits of the serial number stamped inside, the other does not. I've attached a picture with the proofs from the right side of the chamber, the eagle proof also appears on the barrel. Other than the serialization, the only other numbers are 8,83 on the bottom of the barrel, right next to the serial number. The chamber is dated 1916, and the toggle is marked DWM.
I'm very interested in any information on this gun, to the best of my limited ability to judge, it appears all original and unmodified.
http://www.armscenter.com/johnwill/M...y%20Proofs.jpg