M1900 DWM Bulgarian Luger

[gibsonj30]

Thank you everyone for the information and the tips. I wanted to include a few more pictures. One is of the serial number on the barrel and the frame. The other is of a spot on the grip that is missing some finish. It is the worst spot on the pistol.

I am concerned about maintaining it. At one time, it was packed in grease to keep it maintained. Grandpas logic was that cosmoline kept firearms in great shape for years. It took me a while to clean that off. Next, someone thought WD 40 was great. It varnished up and I couldn't get the chamber openned up. I lightly sprayed CRP on the stuck portions of the pistol and that removed the varnish allowing it to be openned. CRP seems to work fine, but someone mentioned not to use CRP because it is a light oil. I use Moble One Synthetic on the pistols I shoot. Can I use it on the luger as long as I use it sparingly?