Ok, I know nothing about these, and little about anything.
I looked at that Luger before reading this thread. My impression was that it might be a 1920 Commercial Navy, perhaps tarted up to appear to be a military 1914 model.
The one thing that
screamed at me was the "Germany" stamp on front of the frame along with the Crown over N commercial proof on the receiver. I've not seen a military Luger with these marks.
I'm all into points and gold stars. Do I get any?
Curl