Nice finds. I have Miss Bissell's Great Aunt Gertrude -- the same basic machine but with a wooden housing instead of "geuine woodgrain metal."
It was a gift from one of my graphics clients; it had belonged to her grandmother. It's in really nice condition but the rubber tires were shot. I came up with a brilliant replacement -- Kirby belts!! A perfect fit once I scratched off all the bits of fossilized rubber which was no easy task.