Hi Dave -
the Henry Dreyfuss-styled*, non-floating Constellation 822 was launched in the UK in 1956. In 1957, the 822 was updated to included the patented Air Lift Suspension technology - the model number remained the same, however, as did the colour scheme. The only visual detail to change was the airfoil skirt.
In 1958, the 822A was launched, again including the Air Lift Suspension. I'm not sure if this cleaner had any significant alterations from the floating 822 - perhaps Hoover just changed the model number to make it easier to distinguish between the floating and non-floating machines.
In 1960, the updated 862 debuted; it featured the re-engineered hose connection and upper shell, complete with the 'fin' handle.
As for the place of production, it may have been Perivale, West London, or Cambuslang in Scotland - perhaps someone could confirm that? On my 822A it just states 'Made by Hoover Ltd, Great Britain'.
862 and 822A are shown below - many thanks to Seamus for the 862, Alistair for the 822A, and Jeff Parker for the 822A hose (not pictured)!
*as with Model 150 and other Dreyfuss Hoovers, although Dreyfuss styled the shell of the cleaner, the core technology was developed and patented by Hoover's engineering team at North Canton. [this post was last edited: 11/27/2010-11:28]
