Buying a Luger, need more info

[stefanosg]

I am looking to buy this Luger. My expertise is limited so I am not sure what to offer. Its a 1937 chamber date and has an S/42 toggle. All of the upper receiver parts match except the barrel. The frame upon initial inspection had no markings on it, not even a serial number. When I removed the upper receiver found a Waffenstamp inside in the area of the takedown lever. The internal s/n's of the frame parts do not match that of the upper. The grips on the one side have a Waffenstamp and I think a P and an O at opposite ends. The other grip has nothing. The barrel has no markings on it except for a "42" on the bottom near the chamber. The inside of the barrel is in nearly pristine condition. Lastly, it has one plastic bottomed FXO mag with an E37 Waffenstamp and P08. I am guessing that this has had some arsenal work done on it, but I am uncertain about that and how it affects the value.