Rebadged Discovery II
I just checked my Discovery II and it also is a model 1572E. My guess is your 'Special Edition' was sold through an alternative channel (i.e., not door-to-door). Sometimes Electrolux would sell variants of certain models through retail stores such as Sam's Club.
My Discovery II is an early version and like yours, it lacks the bag status indicator on the top of the bag door. My Discovery Plus (Discovery II with onboard tool storage) and Genesis LXe both have this feature. One interesting feature yours has is a rotating plastic top cleat for the cord, which my Genesis has but neither of my Discovery machines has. They both have a stationary metal top cleat that's spot welded to the handle, right below the plastic grip.
Take good care of that machine. I would dare say it's pretty much of a rarity.