The Flakpanzer IV "Ostwind" (east wind) had a 6 sided turret. 100 were ordered on August 18, 1944. Turret was similar to Möbelwagen.
The Ostwind had a 3.7 cm FlaK 43/1 L/60 mounted. The main armament could fire 160 rpm/250 rpm. The round weighed 1.4 lbs and had a muzzle velocity of 2,750'/sec. The maximum ceiling was around 5,000'.