P7PSP and PPK are two different Kraut pistols. P7PSP 9mm Parabellum gas retarded blowback, one of three designs along with the Walther P5 ( I have one of these to ) and SIG Sauer P6 (P225) adopted in the wake of the Olympic Park massacre. The best of the three IMO for that time frame it was the most compact high quality 9mm available until the development of the Smith & Wesson 469/669 series and was still slightly more compact until the release of the Glock 26 and Kahr K9 in the early-mid 1990s. My PPK is a 1962 built 32 ACP, the same model that Major Boothroyd and Q demanded that James Bond swap out his Beretta 25 auto for in On His Majesty's Secret Service IIRC, it was released in 1931 as a shorter, lighter version of the PP series released in 1929. The PP series was also the progenitor of the robust Makarov that the Soviets adopted circa 1951, I have a Baikal IJ70 Makarov in my safe as well.