The body armor was a box with sloping bow and stern. Because of the overhang on the front of the machine tracks often stopped in front of low vertical obstacles. The prototype had a commander and driver's barrel-shaped towers in front, on production of their samples replaced the oval dome. Initially bronelisty boards, covering the chassis, reach the ground, but this had to be abandoned because such sewn worsened the already unimportant permeability. Engine and the dynamo were located in the middle part of the body, behind them - the electric motors. The drive wheel, like a tractor "Holt", was in the stern, as well as a second control station. Armament "Saint-Chamonix" was stronger than "Schneider" -75 mm long-barreled field gun and four machine guns.