[mrerick]

It is certainly exceptional engraving work and coverage. Safety bar numbered in the military style, but take down lever not.

If it's a 9mm pistol, I think it's most likely a war trophy that got the engraving in Germany then returned with the vet. If it's in .30 Luger, it could be a DWM commercial that got a full engraving treatment here before 1968 (after which serial numbers were required on guns - the engraving could have obliterated what was there). In that case, the safety bar could be a replacement from a military pistol.

I can't see that a proper dis-assembly, cleaning, and lubrication with corrosion preventing gun oil would degrade the value. Just be careful with it if you do it yourself (there are instructions available on this site). Pay particular care with grip removal, and don't gall the grip screws with the wrong screwdriver blade.

Marc