15 cm siG33 (Sf) auf PzKpfw I Ausf B
Used in Poland, France in 1940, and in Russia.7 Equipped sIG Kompanien (heavy infantry gun companies) 701-706 and were used in Belgium, Holland, and France in 1940. The last ones in service were with the 704th schwere Infanteriegeschütz Abteilung of the 5th Panzer Division in Russia in mid-1943.
15 cm siG33 auf Fahrgestell PzKpfw II (SF)
All were shipped to North Africa in 1942 to the 707 and 708 sIG Kp (SF) (heavy infantry gun companies). Took part in the Gazala spring offensive.