The vehicle was developed in the 1950s. Using the scaling method, Polish engineers took the elements of a medium tank chassis as the base and adjusted those elements to a different weight category. They were guided by the Soviet T-54, which meant that some of the vehicle's components were similar to the first versions of the Soviet medium tank. As a result, it was an extremely interesting design with a rather low silhouette. However, it existed only in blueprints. Such a heavy vehicle would require too many resources of the Polish industry.