Wow SeaLion, I am hugely impressed as I really thought this one might end up in the Black Hole. Well done!
It is indeed the unusual Renault R4-based Nagil, made by Guy Nadal in Frontenac, Southern France in the late 1970s/early 1980s. A photo of this car has eluded me for years, and I have never seen it mentioned in any book, magazine or website article (apart from an entry in the Georgano encyclopedia, which I wrote!), so I am very curious to find out if you know more about this car? Thanks, and well done again. Here's a photo of the front of the Nagil.