I've come across this picture of a three wheeled car from the film High Treason made in 1927 about the world in the (then) future of 1940/50. Can't find anything at all about the car but it does look as if it was not just a film prop. Any ideas?
Here you are:
https://www.autopuzzles.com/forum/2011-39/solved-pj387-mr-a-graham's-home-made-three-wheeler
Thanks. Quite an interesting history then.