That is cool Andy,,thank you for posting that pic,brings back good memories.
We lived in a neighborhood back in the early 70s, where alot of the homes had Central Vac, i remember the next door neighbors having a Beam system with this exact same tool set up with the same wire/vinyl hose, and the same brown tool caddy. They also had a Preco Power Brush for the deep shag carpet, along with the rake attachment. I remember loving to use that Preco Powerhead,,thought that was really neat!
Of course this was 1972 probablly, and i was little, so to me Central Vac was something like the Jetson's would have!
(and something my parents would never have!)
I remember one very large home down the block that had a huge Beam Central vac motor in the garage. Whenever they opened an inlet in the house, even with their garage door shut, you could easily hear that motor whinning,,even a block away. They were VERY loud.
Evidently not having some kind of muffler,fliter, or outside vent hooked up to the exhaust made the noise even louder.