Developed by Hubert Clermont from 1940 through 1942, during the German occupation of France. Some elements of the SOMUA S35 medium tank and of the experimental G1R infantry tank were incorporated in the new vehicle. It was hoped that development would be continued after the liberation of the country. However, by 1944 the project was deemed outdated.
The technical characteristics shown are for the Siege mode
Characteristics are specified for a vehicle with crew members trained to 100%.