Nice plug!
Hi Dan and Dave"
Do you guys know that the cord and plug was made by the Belden wire and cord company, which was based in Chicago? Belden made the cords for Electrolux, Hoover, Kirby, and many others. A lot of people think that these companies made their own cords, but not in the 1940's and 50's. As the Electrolux factory in Old Greenwich, Connecticut, as well as Hoover in North Canton, Ohio, and Kirby of Cleveland were all in residential areas, rubber and bakelite/plastic were not conducive to the neighborhood, and were made elsewhere. As for the Electrolux cord winder for the models XXX, and LX, there's a stamp on the back, 'Vacuum Cleaner Corporation. Philidelphia, Pa.' The wands for the Health-Mor, Filter Queen, Royal/Electro-Hygiene, and others were made by the P. A. Geier Company, also of Cleveland.
One of the key people in the vacuum cleaner division at Belden, was Allan Douglass. It just so happened that I knew Allan, who went with the name 'Doug.' Unfortunately, he didn't like to talk about Belden, so I never learned the process of making vacuum cleaner cords. Doug and I were on and off partners for 9 years, (82 to 91) and while I had turned a spare bedroom into a display room, Doug merely tollerated my collecting, and eventually it caused my to buy my house in nearby Naperville.
I'm fascinated by the Modern Hygiene, it looks a lot like the Royal, Hamelton Beach, Eureka tanks, and of course the Electrolux XXX, The later model has the same square shape as the Electrolux LX.
Thanks for the question Dan, and the pictures Dave.