On June 8, 1957, Rheinmetall recorded a patent for a new light tank with an oscillating turret and a gun with trunnions. The proposed design allowed engineers to equip light vehicles with powerful 90-mm and 105-mm guns while preserving the minimum vehicle height. Rheinmetall did not have their own chassis for the subsequent tank production, and they offered their turret to other plants. The vehicle is a project on the basis of the Hanomag and Henschel chassis. Existed only in blueprints.