How interesting. Maybe that's it.That's what I thought it might be. My guess it is its an early 1950's Volvo with independent coach works.
Found this on the Volvo website:
From 1949 to 1953, the PV445 formed the base for small lorries, vans, estate cars and a few beautiful drophead-coupé convertible) cars. None of these were built by Volvo, but by independent coachwork firms.