Here is my latest acquisition a Mauser BYF 42 3532a that was assembled in late January 1943. It has an early frame and slide with a dusty blue finish on the slide. The AEG 38/Z3 grips were supplied to Mauser by Walther and are stamped with 359 at this time, but Mauser started receiving AEG grips directly shortly there after.
The side view.