A heavy calibre infantry gun, the sIG33 was first issued in 1927 and saw service throughout WWII. It was a reliable and robust weapon which was designed to allow for very high elevation. The gun was, however, light enough to be towed by lighter half tracks such as the Sd Kfz 10 Demag D7 or trucks such as the Krupp Protze Kfz69 as well as being horse drawn.