What is grille ausf. k?

Grille Ausf. K was a self-propelled gun developed by Nazi Germany during World War II. It was based on the Panzer IV tank chassis and was designed to provide mobile artillery support for armored units. The Grille Ausf. K had a 150mm gun mounted on a 12-tonne open-topped turret. It was crewed by five men and had a top speed of 40 km/h on the road and 20 km/h off-road. The Grille Ausf. K saw combat on the Eastern and Western fronts and was used by the German Army until the end of the war. Overall, around 200 units were produced.