ZSU-57-2
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The ZSU-57-2 Ob'yekt 500 is a Soviet self-propelled anti-aircraft gun, armed with two 57 mm autocannons. 'ZSU' stands for Zenitnaya Samokhodnaya Ustanovka, meaning "anti-aircraft self-propelled mount", '57' stands for the bore of the armament in... Wikipedia
Armor: 8–15 mm
Crew: 6 (commander, driver, gunner, sight adjuster, and two loaders)
Designed: 1947–1954
Engine: V-54, 4-stroke, airless (mechanical)-injection, water-cooled 38.88 liter V12 diesel; 520 hp (388 kW) at 2,000 rpm
Fuel capacity: 830 L (including two externally mounted fuel tanks, 95 L each)
Height: 2.71 m; 2.75 m (with a tarpaulin top)
In service: 1955–early 1970s (USSR); 1957–present (other countries)