The Solothurn ST-5 is a 20 mm anti-aircraft gun designed by Solothurn in Switzerland which ultimately was the design basis for the highly successful 2 cm FlaK 30 series of guns used by Germany in World War II.
Solothurn | Canton of Solothurn | Solothurn Film Festival | Solothurn (canton) | Regionalverkehr Bern-Solothurn | Otto Frölicher, ''River landscape', 1868, 73 x 125.5 cm. Kunstmuseum Solothurn | canton of Solothurn |