given the story of the acquisition, I doubt if it is a Russian capture. If the story is true then is is probably a pre NAZI Luger with the DWM scroll. However it should have a serial number. Lugers were hand fitted and the parts should have at least the last 2 digits of the serial number since the parts are not exactly interchangeable. A parts gun would not have matching numbers. Do you have the original magazine and does it have a wooden or aluminum knob? An original magazine would have a wooden knob. If there are no other markings on the pistol including a serial number, then you have an enigma and a possibly illegal one at that.