In 1950s Paris, tour operator Groupe Cityrama commissioned French coachbuilder Currus to create hyperfuturistic double-decker buses built atop a Citroen U55 truck chassis. The result? The Citroen U55 Cityrama Currus, Flash Gordon's bus.

The Citroen U55 Cityrama Currus was double-decker bus with stylishly curved, wrap around glass on seemingly every surface – sort of like a Vista Cruiser station wagon on steroids. Or on a whole sheet of blotter, now that I think about it. The roof was also glass, and that could be removed so the very upper deck could be used for open air touring in the summer months.