The 15 cm sIG 33 (Sf) auf Panzerkampfwagen I Ausf B, sometimes referred to (unofficially) as the Sturmpanzer I Bison, was a German self-propelled gun used during World War II.

The 15 cm sIG 33 auf Fahrgestell Panzerkampfwagen II (Sf), sometimes referred to as the Sturmpanzer II Bison, was a German assault gun used during World War II. The dozen vehicles produced were assigned to the 90th Light Infantry Division in North Africa during the war.

It was the largest weapon ever classified as an infantry gun by any nation. [1] Its weight made it difficult to use in the field, and the gun was increasingly adapted to various ad hoc mobile mounting, which were generically referred to as the SIG 33. Sources differ on the development history, but the gun itself was of conventional design.

Aug 12, 2016 · Before the first 15 cm sIG 33 auf Fahrgestell Panzerkampfwagen I (Sf) (Bison I) had been tested in combat in May 1940, the German Army Waffenamt was already engaged in the development of an improved model based on the …

Jul 10, 2016 · As with its baby brother, this self-propelled artillery gun also has a problem with its name (The 15 cm sIG 33 auf Fahrgestell Panzerkampfwagen II (Sf) has wrongly been called the Bison II or the Sturmpanzer II: this started after the war).

Nov 12, 2022 · The nickname ‘ Bison ’ is often associated with this vehicle, but the Germans never referred to it as such. It is also sometimes referred to as Sturmpanzer I, which was …

Thirty-eight in all were produced in February 1940 by Alkett, officially named the 15 cm sIG 33 (Sf) auf Panzerkampfwagen I Ausf.B. The “Bison” was a nickname quickly gained, because of its …

Mar 23, 2011 · Bison GE148 15cm sIG33 auf Panzer II The Bison has a 15cm sIG33 L/12 infantry gun mounted on a highly modified Panzer II cha

On February 18th of 1941, it was decided to built Sturmpanzer II on modified and turretless chassis/hull of Panzerkampfwagen II. In July/August of 1941, first Sturmpanzer II Bison (lenghtened version) was produced.

Self propelled heavy infantry gun 15 cm sIG 33 (Sf) auf Panzerkampfwagen I Ausf B (Sturmpanzer I, Bison). 15 cm sIG 33 L/11,4 (3 + ? rounds in ammo transporter). Traverse: 12,5° left and right; elevation: -4° – +75°; artillery, germany, wehrmacht.