Hello to You,
the "guide de l'automobile francaise" knows "Paul Arzens of Paris/1939>48 ...
the "les voitures francaises des années 50" (= Encyclopaedie of French cars/1945 > 1961) has dated the Arzens 125 for 1952 ...,
the Wiki-info gives 1942 ...,
the German written "Enzykl. of European Micro-cars/part.I-1945>55" has:
city-car for private use of P. Arzens, 1-Zyl/50ccm/3PS/30km.h, first published in spring-1951
so

,
btw., the right micro-car-photo of Wiki/F not the same car - this electro-3-wheeler starts in Dec.-1942, finished in Dec-1946 ...,
... with greetings, FrankWo.