Experimental Walther Mod. MP ('referred to as the "MP/PP" by Buxton and Rankin) 9 mm parabellum semi-automatic pistol. This pistol is essentially a scaled up version of the Mod. PP utilizing the same blowback locking mechanism, chambered for the 9 mm parabellum cartridge. The Mod. 'MP/PP' was manufactured between 1929 and 1932. Known serial numbers range from 5004-5009. Only four Mod. "MP/PP" pistols are known to exist. This pistol is illustrated and described on pages 38 and 39 of "THE P.38 PISTOL, VOLUME ONE" by Warren Buxton. The pistol has the same general configuration as the Mod. PP with a 5 inch barrel. The pistol features an exposed ring hammer, 90 degree safety lever and magazine release on the left side of the frame. The target type rear sight is adjustable and the front sight is fixed. The slide has a serrated rib between the front and rear sights. The pistol has a cartridge cocking indicator similar to that on the Mod. PP. A military style lanyard loop is fitted to the frame behind the magazine well. The eight-round magazine is blued and unmarked. The left side of the slide bears the Walther Banner followed by: "Waffenfabrik Walther, Zella-Mehlis (Thur)/Walther's Patent Cal. 9 m/m" in two-lines. The model designation: "Mod. M.P." is located between the factory legend and the slide serrations. The serial number (5009) is marked vertically on the right side of the frame behind the trigger. "Crown/N" commercial proofmarks are stamped on the right side of the barrel at the chamber and muzzle, and on the right side of the slide below the ejection port. All components have a high polish, commercial blue finish. This pistol has been extensively illustrated and described in "THE P.38 PISTOL" by Buxton, "WALTHER VOLUME III" by Rankin, and Kresten's "WALTHER, EINE DEUTSCHE LEGEND".