Bill,
That is one very unique Eureka, in that it has all the trademarks of the later 2000 series Vanguard upright, but lacks a Rugulator or Dial-a-Nap height adjuster. These height adjuster features were definitely offered on every Eureka upright by 1970. But this 271 already sports the more modern hood shape seen on the later 2070 Vanguard.
Does the brandplate in front of the headlight come off? If it does, then this is the hose port that is meant for above the floor cleaning as was provided on most Eureka uprights since the late 1950's. Which also means that the tool set you got with this cleaner was from a later year and for a later model Eureka. It includes a pan converter for Eurekas that have no top side hose port.
If yours does have a removable cover for the top side hose port, then this is definitely one of the last models to feature it. Which puts this Model 271 right about 1968 or 1969 just about the same time as the Empress Two canister.
What a gorgeous bit of Eureka history you now own! Enjoy!