Help Identifying a "Blank: Luger?

[DutchLuger]

Let me start by saying thank you to those who took the time to take a look at the earlier posting. I am a first time user of this forum and was amazed to see that people were so willing to look at this random pistol and give me their thoughts. I very much appreciate it.

I have no idea if this will help, but I did some disassembly and photographed a few internal details. The frame has significant corrosion pitting and seems out of step with the near flawless finish of most of the remaining parts. I am just baffled that someone might go to the trouble of creating a low serial number knockoff without trying for a more high value version.

The only aberrant numbers I see are on the housing for the firing pin (maybe a 68?). There are some random letters low on the magazine housing portion of the frame, and some symbols on the underside of the frame near the barrel.

Thank you all again for your input.