 The specifications were not at first overly ambitious and called for a thirty-ton vehicle with 60 mm of armour and armed with a 75 mm SA modèle 1944 Long 70 gun, rendering a penetration of 80 mm steel at 1000 metres and developed by engineer Lafargue from the 75 mm CA 32 gun, conforming to the earlier CDM intentions.It was hoped that fifty vehicles could be delivered per month from May 1945 onwards.On 28 December the order for the 75 mm tank was reduced to two hundred vehicles.