My New 1917 DWM Luger questions

[BarrelBaggins]

Hello!
I am new to this forum and was hoping someone could help me with what kind of Luger I have just purchased.

It’s labeled 1917 (no 1920 so I’m assuming this was illegal to own after the whole confiscation happened) and it’s a DWM. I believe the proof marks mean it was a military Luger.

The markings I don’t understand are the ones on the trigger guard. They almost look like an RC with a crown and then under that a letter A with a crown.

I also noticed it has a seat safety installed which was more of a police modification but I am not seeing any police markings. The holster it came with is also a police model holster that was matched to the Luger.

All parts seem to be matching.

The magazines have matching numbers but I know the 1917 Luger came with wood bottoms. Maybe the magazines were updated? I also have the second magazine.

This Luger also came with bring back paperwork from a US soldier that states the Luger (with serial number) and holster.

I’m just trying to figure out the markings and a possible story.