These are fun to play with - overflow rinsing from Frigidaire in the 70's!
They are rather loud but they do move the clothes around if they aren't overloaded. We had one here for the convention in '05, it sort of fell out of the sky a week or so before. I had never seen one before and it was a lot of fun to watch.
The GM Frigidaire had very fascinating mechanism, Syncro-Swing with springs pulleys and cables to swing that Agi-Tub back and forth. Used a spin-roller from the rollermatic washers and had a pump integrated into the plastic outer tub.