Ok, now thats a find I have never seen before and I thought I've seen all the Hotpoint BOL lineups. The front panel almost fooled me for late 80s, but the motor, insides and lack of heated dry on/off switch scream 1960s/early 1970s.

Hotpoint should have kept this motor and pump and improved on it, the later version held a half gallon of water which considerably worsened energy efficiency and water consumption in comparison.

Does anyone know of the exact date or model number? This is a rare machine. 

I am almost tempted to say this is some type of builder's grade legacy model that was kept in production for a few years after Hotpoint switched their other machines to the shaded pole pump and motor. In the same way porcelain tub Hotpoints continued into at least 1991 despite their Permatuff line being superior with BOL permatuff production having started 1983. 

We had a mid-sixties Hotpoint in a house bought in the mid-80's.  Miserable performer all around, especially after having a four year old  Maytag Jetclean in the previous kitchen.  The sound of water smashing around in the machine was impressive but sadly, the results were usually a let-down.  

Knew of several families that had similar HP dishwashers, usually in builder-grade kitchens of new homes.  Most of them lived up to the mediocre reputations that many dishwashers had at the time.  In later years, when replaced with new machines, their attitudes toward dishwashers slowly changed.