Before everybody shouts "REPOST", it IS a repost of one of Joao's solved puzzles.
My reason for reposting it is that I have new information that changes the solution.
It was 'inspired' by a Saoutchik Delahaye but wasn't built by them.
There is a story behind this particular car.
I sent Joao a PM but he's travelling in Europe at the moment and I'm sure he won't mind me reposting one of his puzzles. The answer was almost correct but not quite if you see what I mean.
One point for who the coachbuilder was and you can restate the base car and year.