Berliet obtained an order for a prototype on 4 December 1936. A tractor and trailer were however only presented to the "Commission de Vincennes" on 6 March 1939, testing starting immediately. The type again resembled the Renault UE but was somewhat higher. It had three bogies per side with two road wheels each, sprung by horizontal coil springs. The weight was 3.05 metric tons, its stop speed 36 km/h, the range 143 kilometres. The first report of the commission was favourable and trials are resumed on 24 April, lasting till 20 May. It transpired that the tractor could attain a top speed of 30 km/h even when pulling the trailer. The commission concluded on 8 June that the Berliet "chenillette" was superior to the Renault UE in speed, range and mechanical reliability and saw no objection against taking it into production. This however was eventually rejected by the Army in order to concentrate all production facilities into a single type, which had already replaced the UE: the UE 2.