found this photo
The Chevy Show truck semi trailer can be seen in the back
I think it's from Canada because I looked up "cine sphere 3" and says .....
"It's Expo 1967 in Montreal Canada and multi-screen film presentations are the rage of the renowned international fair. Canadian entrepreneurs and filmmakers Graeme Ferguson, Roman Kroitor, and Robert Kerr actually produced some of the films being shown, but made a decision to create a single projector/screen motion picture system which would equal or surpass the grandeur of the cumbersome multi-camera systems. IMAX® corporation was born."