Different motors
Rob Walton if they did change the base, they kept the rear wheels, cause they match color. Also the kept the hood, as the trim on that matches.
The motor on this machine looks similar to one off of a World Vac Style power nozzle.
My Eureka RotoMatic power nozzle from my green 1784B with head light does the black colored motor as Rob Walton describes above.
A different Eureka RotoMatic power nozzle that I have is burgundy colored actually says Eureka RotoMatic and is a non headlight equipped flat design. It has a different motor. The power nozzle claims its 1.5Amps, looks to be a metal outer shell and is rounder in shape than the boxy looking black motor seen on the 1784B. The motor is all closed up, different from the motor in my Express which has the fan and a lot of the wiring exposed.
