I actually found a similar one
upstairs in the soon-to-be HOOVER gallery. It went on a 28. They did away with all of that in the 1960's. Both standard and deluxe models had straight tubes. The deluxe set had the telescoping wand, dusting brush, and a different upholstery brush (the one with the rubber teeth).Later, with the front conversion tools, some had the curved wand/tube. I re-discovered all of these while perusing the upstairs room... TONS of hidden treasures. I'll post pics soon in a different thread.