Panzer.IV lower hull sold separately.
3.7cm Flak 43 included.
The Panzer IV's turret was removed and replaced with an open-top, hexagonal turret which housed a 3.7 cm FlaK 43. In addition to its intended role as an anti-aircraft weapon, the fast-firing gun was highly effective against light vehicles and minor fortifications. A closed-top design would have been preferable, but this was not possible due to the heavy smoke generated by the gun.
The Ostwind's main improvement over the Wirbelwind was the FlaK 43's increased range and stopping power over the 2cm Flakvierling 38 and slightly better armoring on its turret.
Although an order for 100 vehicles was placed in August, 1944, only 44 vehicles were completed (37 converted from existing Panzer IV's and 7 new production vehicles) from December 1944 to March1945