I have a Penncrest JCPenney branded Hoover Constellation, which I'm told is quite rare. It's also the first model of Hoover Constellation that had the tilted design and plastic on board attachment rack.
You will find Lexan-base Sanitaires all day long as they are as common as the dirt they pick up but the old cast-aluminum base ones, with the square brushroll ends clipped in by spring levers, are quite rare.
I also have an early 70s JCPenney Hoover Convertible, which are rare as well.
I'm going to say it's probably this very old eureka, although I do have a Montgomery awards relabeled Hoover upright in a rust color, but I'm betting there was a few of those.
Charlie:
Those Air-Way's. As someone who also owns the twin motor models, I believe they can out clean a Hoover 150 any day of the week. And on many levels.
Wow - rarest would be difficult to pin down. Have a few very rare machines.
I suppose I should start with the 1911 BVC Britvac and 1920s Goblin model 40, Then the Classic and the President model S341.179. The last one that comes to mind is my Ruton R500 Although I will probably think of more lol.
As always, you share a series of interesting vacuums. And While I'm not certain of the name of the first one in your line-up, I can tell you that it's very similar to 'The Baby Daisy,' which dates back to 1890. It was called the 'Baby Daisy' because it was the portable version of the 'Daisy,' which was massive, and most likely stationary.
I had the opportunity to see the Baby Daisy at the Hoover Historical Center in August of 1979 and was very impressed. What you have seems to follow the same basic structure, bellows to create suction. Thank's for sharing.
And speaking of the 'Baby Daisy,' there was an upright version made in America, In Ludlow, Vermont, to be exact. It was called the 'San-Vac,' and you pumped the bellows with upper handle as shown it the pic. I did a patent search when I first acquired it, which was July of 1976, and like the Baby Daisy goes back to 1890. Many companies were experimenting with designs of bellows vacuum cleaners, and this was one of the better ones.
I’ve heard that they clogged near the bag connector, making the model C a big upgrade with its better bag connection angle. Also, seeing as it’s made of pressed steel, they likely all rusted away/sent away on wwii scrap drives. If you know of another, please let me know.