Bill Ivins is correct on this one. Electrolux came out with the Diamond Jubilee in 1984 to replace the Silverado, with chrome & dark blue trim. Then came out the Marquise in late 1986 if memory serves correct to replace the Diamnond Jubilee, & it was a light pinkish brown with a white top. Then the Grand Marquise out in 1989 to replace the Marquise, with a white body & blue top. Then the Ultralux with white body, blue trim & chrome top, & it says Ultralux at the back, on a label same as the Diamond Jubilee had. The Ultralux was also one of the first Luxes to have the lighted PN-6 nozzle, which was also the first Lux nozzle made where the floating axle could be removed & 2 fixed axles could be put in place to make the wheels stationary & make the PN dig into the carpet more.
Now this is for the American models. In Canada, in 1982 we got the E2000 in creamy Beige to replace the AP280- the only Electrolux EVER MADE WORLDWIDE to have a 2 speed motor- & that lasted till 1984 when the 2100 came out in white with a blue top panels, & also introduced the PN-5. They also sold the low-end LE model to the 2100, which eliminated the Automatic Control. Then in late 1987/early 1988 they came out with the System 90, which had white body & brown top panels, & again there was a LE model to match it too. And so on from there....
Hope this helps, Rob