this is not what is appears.... im not sure where that builders plate came from, but photos 14 and 16 show its true lineage as a 2nd generation super sweep from the residue of emerald green paint left on the fan case and rug nozzle.
that is commercial kirby dolled up into some very elaborate bojacking a vac shop likely did to sell it to a customer or commercial cleanign svc. the wrong belt lifter was the first clue. your closeup photos show more damning evidence...
