that they were very agile, but also noisy, poorly balanced and lacking sufficient range; unsurprisingly, the crew was always in for a bumpy ride. After the exercise they were sent back to Renault, who shortly afterwards submitted three types for evaluation to the Commission d'Expériences du Matériel Automobile at Vincennes: prototype 79758, still with the original suspension, 79759 with added internal hydraulic dampers and 79760 with a fully new suspension consisting of a central bogie with a leaf spring and wheels at the front and the back connected to two horizontal helical springs. In November and December 1932 the "Commission de Vincennes" tested them, using as reference changed specifications determined on 10 June 1932. They were found to have a sufficient speed (56.25 – 60 km/h), but an insufficient range of 166 - 188 kilometres and to be too heavy with a weight of 4.8 tons. On 8 December it was decided to abandon the unrealistic three ton weight limit and install larger fuel tanks and heavier armour, 13 mm thick; the vehicles were again sent back. In April 1933 Renault submitted two types, fitted with 0.5 ton weights simulating an up-armouring from nine to thirteen millimetres maximum: 79758 rebuilt with a horizontal rubber spring suspension and 79757 fitted with a suspension derived from that of 79760, but now with a central vertical spring and the casings of the horizontal springs filled with oil to make them act as dampers. They were tested until June 1933 and, against the strong advice of Renault favouring the rubber springs, on 6 June a production was ordered for prototype 79757 as the AMR Renault modèle 1933 or AMR 33. Production On 8 March 1933 the Cavalry had already made a preliminary order of 45 for whatever type would be chosen. This was confirmed on 22 June together with a second order of twenty vehicles, deliveries were to start no later than 1 July. In the autumn a third order was made of fifty. The first vehicle was only delivered on 1 June 1934 however, due to financial difficulties; the last of the 115 in September. The production of the Citroën half-track was limited to fifty. It was decided to rebuild the original prototypes into standard vehicles; however in fact two were used to develop the AMR 35, an improved model that was necessary because the too-fragile suspension of the AMR 33 was prone