Edit: I've just discovered that I already have a file on this car, having attempted to identify it several years ago. My file contains a more complete version of the puzzle image--indicating both the coachbuilder and approximate year--but it appears I was unable to identify the manufacturer/brand at that time. And so now I have a particular interest in seeing this puzzle become solved.
![Smiley :)](https://www.autopuzzles.com/forum/Smileys/default/smiley.gif)
Let me begin with one of the manufacturers/brands I had listed as a possibility: Georges Richard/Pony?