https://youtu.be/TqRmg6uKJR0 The Czech vz.52 service pistol actually began as a commercial export program at CZ. It was developed by two brothers, Jan and Jaroslav Kratochvíl. They actually designed two pistols with similar shape and controls, one blowback in .32ACP (which became the CZ 50 and then CZ 70) and one with a roller locked action