Pixie matching...
Austin and Fred,
The Pixies pictures are both 1950's models. The first one would be vintage 1953-56, and matches exactly the model 63 upright and the 82 Connie.
The 2nd one pictured would be from 1956 or later, its colors match the model 14 Larkand would be vintage 1956-58.
I don't know all the models of pixies, but there was one that matched the model 66 Convertible, and one later one that matched model 68.
I'd also have to look it up, but if my memory serves me, the dustette was produced through the late 40's and them morphed into the Pixie in 1953.
I'll check on that one. While Hoover heavily advertised in the 40's and 50's, the Pixie/Dustette got very little press...