3 sets of those as a kid, loved them, the rubber bands broke quite quickly in the back they just crumbled, and the one I actually tried water in failed permanently. I always thought it was a cop out they put an agitator in the washer and not a tumbler! They had tops originally with windows and red and green lenses.
Didn't they know Westinghouse Laundromats had taken the thrashing blades of the old fashioned center-post agitator and placing them on the sides of the tub, creating the new way to wash -- "revolving agitator" action.