As to the Electrolux Vaporizer.
It goes back to the model XI (11) 927, and the model XII (12) 1930. But the big change came in December of 1937 with the model XXX (30) known as 'The Dirt Digger.' Then in 1948 there were huge changes. The vaporizer, and spray gun were improved. There were also the new attachments holder, called the 'Companion,' so the tools could ride piggy-back. The Garment-air bag, Cord winder, and the air-powered polisher. Joining the line were the updated dusting brush, and floor brush, both with white bristles for delicate surfaces like lampshades. These tools, and attachments were also used with the model LX in 1952, with only the color of the trim changed to a blue gray, and the spray gun in black.
Each of these tools can be found on Ebay, so you can have the complete set.