This is an example of an early production pre-war commercial Walther PP semi-automatic pistol in rare 6.35 mm auto caliber. These PP and PPK pistols produced in 6.35mm auto (25 ACP) were produced on a very limited basis by the Walther factory as they were not readily accepted by the German commercial market. The left side of the slide has the Walther Banner followed by the two-line Walther factory address, patent markings and caliber, virtually identical to the 7.65mm model aside from the caliber marking. The right side of the pistol has the pre-war commercial "crown/N" stamped on the slide, chamber and muzzle. The right side of the frame has the vertically stamped PP serial number, and the interior of the slide shows both the proper hand-scribed partial number as well as a series of machined weight-reduction cuts. It is fitted with a 90 degree safety, ring hammer, checkered Walther banner grips and an unmarked 6.35mm sleeved magazine with black plastic base. Noted by serial number in "Walther Models PP and PPK 1929-1945" by Rankin, page 76.