I have been meaning to post this in the "information requests" thread for some time, but I don't see why it shouldn't be a puzzle.
This is from last year's calendar which hung on the wall above my computer. It's by the French photographer Robert Doisneau, and is jokingly called "Bolides". Translate that as you will. "Racing cars", "speedsters", " balls of fire", or whatever.
It is known that some of Doisneau's "spontaneous" street photographs (such as “Le baiser de l'Hôtel de Ville") were carefully posed, and I suspect that this is the same.
But what is the car on the right? Perhaps I'm being stupid, but I just don't know.
The photo was taken in Paris in 1956, but the car is obviously much older. I don't know anything more than can be seen in the photo. I don't even know if it has three or four wheels.
It has independent front suspension by a sliding pillar system, and friction dampers on the front wheels. It is right-hand-drive and has an outside gear lever. Behind the grille it looks to have an air-cooled V-twin motorcycle engine, set fore-and-aft to drive the rear wheel or wheels. I'm not sure, but I don't think it even has brakes on the front wheels.
So, esteemed colleagues, any ideas? A point if you can prove your answer.