Ah, excellent clue. I only had about three guesses left before I would REALLY have to get into some serious digging (not that I mind that - as I always say, the research is at least half the fun!). My three remaining choices would have been: Ghia-Aigle, Graber and Van den Plas. Your hint make me think Belgian, and similar to VanVooren . . . so I decided to jump right to Van den Plas. I then did a pretty thorough online search of "Delahaye Van den Plas", and there was the quiz photo. Unfortunately no more information than that - so my guess will be that it's a Van den Plas drawing of a proposed Delahaye. I don't have a year or even a model designation.