Somehow the caption doesn't seem to match the picture.
Thanks Carnut & Wendax - this would have gone unnoticed if you both had not drawn my attention to it......
Back to the drawing board!
Egg on face time!
I think the best solution is to relaunch this puzzle in the Pros section now that I've discovered its true identity.
Frederick59 and mekubb can keep their points as they were both correct in their observations.
Now a point is on offer for identifying the make and model of this extraordinary vehicle.
It has already been established that it is a mobile blood transfusion unit bodied by Gruau.
Would an admin kindly move it to the Professionals and I'll alter the heading to reflect its present situation.