Hi Gary!!!!! How are ya buddy?
Okay...if memory serves me correctly, Eureka's first Roto-Matic power nozzles came out in 1973. There were three models, all in the 1200 number range. Eureka basically took two versions of their "Sweet Sixteen" canisters, the basic 1620 and the top of the line 1680, and added basic Roto-Matic nozzles to them. The low end model was in harvest gold, and the fancier version was in a nice bright orange - it included a "Control Panel" with a "bag-full" indicator, and suction control dial. The top of the line of the three Power Teams was basically an Empress II "Fast Vac" (I think the fanciest Model 1880) married to a fancier power nozzle with headlight. Consumer Reports loved the first two models, but the Empress II Power Team was rated "unacceptable" because the 360 degree swivel hose could pull out the pig-tail power nozzle cord from the canister, causing a shock hazard.
In Canada, the Eaton's department store immediately had all three Eureka Power Teams on sale as Viking Power Teams. I remember how excited I was to see the first hints of their arrival at a local Eaton's in Montreal!!!! The vac display first just showed the power nozzles without the rest of the machines!
The next year, in 1974, Eureka added a really low budget Power Team which was basically a red Princess canister married to a red Roto-Matic nozzle. It became Consumer Reports' top-rated power nozzle canister in the 1974 tests, and was a Best Buy because it was relatively inexpensive compared to other lesser performers.