We don't send postcards usually, we post them here.
It is a gorgeous concept for a car, I agree. I managed quite a few photos whilst I was over there.
Cute, my parents had that kind of Citroen some 30 years ago :-D. There are a few of those left in Zagreb too, but strictly as a part of a marketing for a company or as an old car curiosity. I'm surprised at how many of them you managed to see in France! :)