Those vacs were fun to use, and had excellent power,(as long as the bag wasnt socked full) but were very heavy to lift, a pain to drag around the house.
The canned ham would get caught up on doorways and around corners easily. Vacuuming up or down a long staircase was practically impossible. The vac did stand upright by itself, but would fall over easily on stairs. I wished the hose had been a little longer,,would have made the entire vac easier to use.
I remember an elderly neighbor lady that had thick long shag wall to wall (including the stairway) carpet that had one of these, the Empress 2 Eureka version. It was much to hard for her to use and pull around, so she would pay me to come over and run it for her every Saturday afternoon. Was defintaly in the mid to late 1970s. This vac did give you a workout,,i remember being worn out after doing her whole house. I think she paid me 2 dollars. haha
I remember the suction was so strong, and PN so agressive,(espeically with a new bag installed and new belt on the PN) it would clamp itself down on low pile carpet so tight you could not move the PN,,,had to switch to a lower suction setting, or set on a the low speed.
Definatly a very agressive vacuum cleaner!