The Snowbug model LUVBUG — the snowmobile meant for two, was produced by the Original Equipment Manufacturing Ltd. [OEM] in Sudbury, ON. The sled had a single front ski, along with the two seats.
Photo below taken at the 2002 Eagle River Reunion, in Eagle River, WI.
Snowbug snow machines were sold through the 1950s, 1960s and 1970s, by its inventor Howard Schraeder and avid snowmobilers in and around Sudbury, Ontario.
Purchase a book on the history of the Snowbug snow machine at: http://www.highwaybooks.ca/111.htm