My dad has a Citroen B11 from -54 that he bought when he was young at the end of the sixties and has kept alive since. The design is from the thirties and revolutionized suspension at the time, winning races. Citroen has always been at the forefront of suspension development.
The Traction Avant is a thing of beauty. Literally the only car I ever lusted after. Pure class, with a slight air of lawful evil.