Bofors 20 mm automatic gun L/70
Bofors 20 mm automatic gun L/70 (Swedish military designation: 20 mm automatkanon m/40, 20 mm akan m/40, lit. '20 mm autocannon m/40') is a Swedish 20 mm calibre autocannon, constructed by Bofors during the latter 1930s. The weapon was intended for both anti-tank and anti-aircraft use.
Source: Wikipedia — Bofors 20 mm automatic gun L/70 (CC BY-SA 4.0)