The Probert Encyclopaedia of Warfare

SIG 33

The sIG 33 was a German howitzer, classified as an infantry gun, first deployed in 1927 and used throughout the Second World War. The sIG 33 fired a 150 mm calibre 28.8 kg shell to a range of 4700 meters with a muzzle velocity of 240 meters-per-second.
Research sIG 33