May 10, 1945 after the withdrawal of the Soviet troops at 266 kilometers from Berlin. in (Rheinmetall), an order was received for a heavy ZSU capable of knocking down planes and destroying tanks in the similitude of the IS-2 to a board from a distance of 1000 meters.

May 17, 1945 (Rheinmetall) developed a heavy ZSU from scratch on a new hull with 4 "3.7 cm guns Flak 36, on May 20 at the approach of the British troops, 3 ZSU (Geschuetzwagen VI 3.7cm) destroyed 5 medium tanks Sherman and 3 tanks Cromwell lost one ZSU, with a blast exploding it.

May 21, already at the offensive of the Soviet troops, 4 ZSU was destroyed by the order of 13 Il-2-37 assault planes and destroyed the new Il-10 with 4 aircraft.

Realizing the potential of this ZSU it was launched into mass production, the approach was already a new medium tank.