1950 Volvo P445 Cabriolet by Gustaf Nordbergs Vagnfabrik.
And I thought I had seen every Volvo!
For a good while I was convinced that NEH 4013 was an owner built custom car, owing to the rear wings which seem to belong to a 1949-1950 Chevrolet sedan. And what coachbuilder would just borrow major body panels like that? Or so I reasoned.
More fool me..