What finish is on the breechblock pin, it appears fire blued??? An all salt blued Mauser should also have a salt blued pin there?? It might be just a hardened part that took a plum type color too during the salt bath. A couple of other things kind of stick out to me. Not much wear on the frame rails, the paint in the Gesichert looks a little more tan (WWI type) than an off white(Mauser type). Type 3 Army mag? A very nice looking Luger.