Walther P.38, the standard service pistol of the German Wehrmacht during World War II, chambered in 9mm Luger (9x19mm Parabellum). The markings "ac/43" on the slide indicate it was manufactured by the Carl Walther Waffenfabrik factory in 1943. These pistols are historically significant for their innovative design features, such as a double-action/single-action trigger and a decocking lever, which became standard on many modern handguns.