Did you know that another type of snowmobile preceded the Ski-Doo -- enclosed and much larger?
The first “snowmobile,” called "B7," was conceived by Joseph-Armand Bombardier, a Canadian, in 1936. It made use of two of his innovations, the sprocket wheel and a rubber-track system. The new vehicle successfully allowed snowbound people in rural or remote communities to travel during winter.
This snowmobile dates back to ca. 1939. It can accommodate up to 7 passengers and was used for rural mail delivery.