The ZiS-2 was a Soviet 57-mm anti-tank gun used during World War II. The ZiS-4 was a version of the gun meant to be installed in tanks. ZiS stands for Zavod imeni Stalina, the official title of Artillery Factory No. 92, which produced the gun first.
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Address 52 Parkovaya ulitsa, Прохоровка 309000, Russia
Coordinates 51°2'34.675" N 36°45'2.668" E