Woops, you are right,,the Kirby Heritage 2 is from 1985,,and come to think of it, the Filter Queen Mejestic and Tri Star are from the early 90s. Ok,,the most powerful pre 1980s vac in my collection would have to be my Tan Lux G from the late 1960s, or the Golden J from 1975. Both with a newer upgraded hose and PN.