Well done Carnut, it is the DAF P500, which morphed into the P900, then the DAF 77, and ultimately became the unfortunate Volvo 340-Series. Michelotti submitted designs for this project, but this model was not one of them.
Oh, and if ever you find yourself in the Eindhoven area, the DAF Museum is well worth a visit. I went there a couple of years ago and thoroughly enjoyed it. Double Oh; you're now only eight points away from entering the Twilight Zone by becoming a Pro
!