1918 S/42 Luger

Do you know when and where your father obtained this Luger?

I would recomment that you check all the parts for Third Reich era markings like such as S/42 replacement codes and the various 30's-40's style eagles that are pictured on this site. Also look at the proofs on the barrel as these were often replaced on older Lugers during WWII era.

It is obvious that the pistol (less the toggle assembly) as been reblued over a pitted frame and receiver and that the magazine has been re-numbered to match....the question that the examination above could answer is WHEN it was done. It is certian and widely understood that many WWI era pistols were refurbished during the Third Reich period by both the Army and Police (yours is not Police due to the lack of a sear saftey). I have personally examined examples that have been period and officially re-blued (both rust and salt) over such pitting as is apparent on your example.

IMO and the opinion of many other collectors that I know, such examples are certainly legit collectors pistols as opposted to post-war restored shooters. Futher investigation on your luger is in order.