July 12, 2022
There was only one 150mm s.IG.auf Fgst. Pz III was produced during WW II and the vehicle was served in 200 Schutzen Regiment of 90 Leichter Div.
I did not find the exact time that DAK finished the modifications on this vehicle, but according to some researches we knew the chassis of this vehicle was from a Pz. III H which affiliated to 21st Pz. Div., the turret of that Pz. III H was heavily damaged and not worthy to be repaired; meanwhile, one of 150mm s.IG 33 (Sfl.) auf Pz.Kpfw. II’s (Bison II) from 708 motorized infantry kompany lost its power and engine could not be recovered any more, luckily, its 150mm howitzer was still in good function. Under this circumstance, the engineers on frontline made their decision: they removed the Bison II’s 150mm howitzer and installed it to the chassis of Pz. III H.
Many of photos for this vehicle were taken in early 1942, so we could infer the vehicle’s revision works were all finished in early 1942 and it should participate all actions in 1942 (i.e. Battle of Gazala, Second Battle of Tobruk, Battle of El Alamein, etc).