Yet another "what do I have"

[garycarter]

Howdy Folks,
I will try to get some decent pics posted this weekend, but here's what I have (belongs to family member):
DWM, 3 3/4" barrel, no chamber inscription, square/knurled knobs, 7.65mm, with stock lug, no grip safety, checkered wood grips (no border or insignia), thumb safety has rear 'safe' position, wood magazine plug.
Serial number: 1017 with script 'o' suffix, all visible parts have matching numbers (I haven't disassembled). The bore is pretty clean and bright (the rifling looks shallow to me).
On left side of gun, at chamber, it is marked with an upright 'N' with a Crown on top (#28 from list on Parabellum website) and 'GERMANY' directly beneath. Same N with Crown under barrel.
Grips are clean, fairly sharp, with a nicked spot on left grip where a wedding ring would be if you shot left-handed. Magazine has no markings that I can see. Strawing is clear and fairly bright. Blue looks 70-80% to me, but just a guess. How do you determine if it's been reblued?
Well, thanks in advance. Bad news is, I'm starting to really like this gun, and haven't even fired one.
Gary