When we moved into our new house in September, 1961, the O'Keefe & Merrit version of this was in the kitchen, albeit with only the big knob (builder model). It was pulled out and moved to our old house and the Waste King was put in its place. My Godfather's family moved into a house in 1963 that had the same new dishwasher. They had it until the early to mid 1970s, replaced witha TOL Hotpoint. Poor people, they never had a decent dishwasher lol. Anyway, I got to load and run theirs numerous times. Didn't really hold a lot and like Tom said, piss poor at cleaning.