This was made by Eureka's Canadian division called Onward Manufacturing in Kitchener, Ontario. If the handle is metal with metal assembly bolts and a rubber hand-grip, it's from the late 1970's. If the handle is plastic with no rubber hand grip, it's more likely from the early 1980's.
Eureka had a contract witn Canada's Timothy Eaton's Department Store chain for close to two decades - 1965 to 1985...maybe even before 1965. Eaton Viking was the national retailer's store brand for electric appliances and once had a logo featuring a viking ship.