Meanwhile, between April 1936 and July 1937 Renault and the French government had had a major disagreement over the question which company should be given the order to supply the cast cupola; eventually this would be Batignolles-Châtillon. Only on 13 June 1938 Renault assembled the first vehicle (from the first series N° 95865 - 95869), that then went to Rueil to be fitted with the gun. On 9 December it was finished and Renault could begin the manufacture of the last nine vehicles (including the series M 3036 - M 3040) of the two hundred Renault ZTs: the second hull was delivered by Schneider on 31 October. The deliveries will have extended into 1939; op 2 September 1939 all GRDIs had attained their organic ZT 3 strength.