It could even be early 1980's. Eureka changed their brand graphic with the debut of the first Mighty Mite canister - which I think was 1983 or 1984. A short few years later, they took the same bold font and slanted it for the later versions of the Eureka Express - maybe around 1986 or 1987. Since this vac's brandname is not slanted, I'd say it's from around 1984.