Right. Here is the caption of the picture I've posted in my reply #17 (in a website you surely found):
Guerre 1939-1945. Voitures électriques. A g. : voiture à carrosserie en aluminium de Paul Arzens (au volant). A dr. : coupé fabriqué par les ateliers Bréguet. Paris, juillet 1942.
And here is the Serge Bellu letter mentionned in my reply #9:
I was very interested in the "Lost and Found" in HCC #2. I am able to give you some information about the mystery car shot in Paris during WWII.
This silver-bodied roadster is a prototype designed and built by Mr. Paul Arzens in 1940. This car was built on an old chassis taken from an old Fiat car of the twenties. The body is an original design sketched by Paul Arzens, who enjoyed aerodynamic lines. Thanks to light alloy, the body weighs only 25 kg. The length of the prototype is 4.8 meters.
This car, named "L'Electrique," is powered by an electric engine placed under the seats. It uses heavy batteries weighing 1,100 kg. The engine delivers a poor 10hp with 420 A and 72 V. The autonomy is 200 kilometers at an average of 65km/hr.
The car has a license plate (6553 RN) given in June 1941. Paul Arzens, who lived in Paris in the Montparnasse district, often used this car in the city. After WWII, Arzens modified "L'Electrique" and added bumpers and headlamps.
Born in 1903, Paul Arzens was a student at Paris Fine Arts school. Just before WWII, he built his first car, named "La Baleine," on a Buick chassis. In 1943, Arzens built a third prototype named "L' oeuf" (the egg!). It is a very interesting city car, still with electric engine.
In 1947, Arzens was appointed designer for SNCF, the French state company of railways.
Serge Bellu
Paris, France
The two cars have so many similarities in their design that I keep wondering what is the exact story...