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The Compagnie Générale de Construction de Locomotives Batignolles-Chatillon presented in 1935 a prototype for an amphibious tank, produced at the request of the Section Technique des Matériels Automobiles de Combat (literal translation: Technical Section of Combat Automobile Materials).
The first tests took place in March 1936, but the machine sank at the end of the demonstration. The tank was modified by the manufacturer and tests continued until 1937, but the development proved to be difficult.
The project then was suspended, and it seems no actions were taken afterward.
Translated from http://www.chars-francais.net/2015/index.php/engins-blindes/chars?task=view&id=796
Original source: not specified + fr.topwar.ru website for the pictures