This car, made by the French company Citroën, was known as the "deux chevaux" (two horse). John and I owned one for a while in Los Angeles. You can read a lot about it (maybe too much, really) on Wikipedia:
http://en.wikipedia.org/wiki/Citro%C3%ABn_2CV
There are still plenty of them in Argentina, but I get the feeling that they are seen, even here, as a bit odd.....