This is, I believe, an early study for the all-electric 1961 Ford Firefly. Other photos I have seen of the car must have featured a later version as they are slightly different, and that threw me off for a while. Apparently Alex Tremulis did one side of the car in your Quiz photo (which he called "Astrion"), and British-born Colin Neale did the other (which he called "Firefly"). Here's the later version, which makes it appear that Neale's Firefly won.