On 3 November 1937 Hotchkiss presented the prototype of a tractor; on 10 December of a trailer. On both elements however the manufacturer had not done any testing, the vehicles having been transported to Vincennes as soon as they were finished. Therefore, the commission delayed its trials until 27 December to allow Hotchkiss to make final adjustments on the base area. The tractor was tested until 10 February 1938. The type closely resembled the general outline of the Renault UE. The main difference was the presence of two bins instead of one, able to tilt sideways, positioned over the back of the mudguards. This doubled the carrying capacity. Instead of the small hoods, two very large armoured covers, retractable to the back, served as both entrance hatch and visor. The engine, differential and steering system were judged to be acceptable. The suspension system however was considered to be too weak, not having been reinforced to match the larger cargo mass to avoid surpassing the specified total weight. It consisted of two bogies, each with two small road wheels, sprung by narrow horizontal coil springs. A large tension wheel trailed on the ground, which lowered ground pressure to compensate for the larger weight of the bins but also increased track resistance and vibration. The cross-country speed was just 15 km/h. As even during testing when fully loaded entire bogies collapsed, the prototype was rejected.