As guessed by yonah, Mystery Car XXXVI is a Volvo Duett.
The Duett was an automobile from Volvo that was in production from 1953 to 1969. The name Duett was intended to signify to a car that could be used as a delivery vehicle during the week and as a comfortable sedan away from work. The Duett was produced in three body styles: an estate car (or station wagon), a panel van, and, in small numbers, a bare chassis with no body from the windshield rearward. ... The Duett was the only automobile marketed by Volvo in the United States that used a separate frame. All other models were of unibody construction.Click on the picture above for more detailed specs.
Volvo Duett by Wikipedia