Hi Tom.
I was under the impression that this was made at the P. A. Geier company in Cleveland, Ohio. I know that this was the parent company of Royal, and that they made the motor housings, and assorted parts for many uprights of that era. Brands like Health-Mor often farmed out a number of parts. P.A. Geier, of course, took no credit for these machines, simply did the castings, and other grunt work, then shipped them to the various companies for assembly. Electrolux did the same thing.
I have two Electrolux cordwinders for the models XXX and LX, that I thought except for the machine end of the cords, were exactly the same. Upon checking the first one to verify the manufacture which is indeed "The Vacuum Cleaner Corp. Phila, PA.."Stamped on the back it reads "Type T Cordomatic reel, patent pending." The other is identical but is stamped "Benjamin reel mod 8850-3, Cleveland, Ohio. Patent no. 2322038, other patents pending." Interesting!!
Alex Taber.