Even though there is a striking similarity with GE's mid-1950's top rack design, I believe this is a 1958 D&M Dishwasher. They were produced for various Brands including Whirlpool (I have one), Sears (I have a Kenmore/Cascade magazine ad), and various other companies. Now, up until this point in time, I do not believe that we have seen portable dishwashers with the Hotpoint Brand. Perhaps, Hotpoint engineers worked with D&M and incorporated certain Hotpoint/GE features for these portables - the most obvious one being the Bakelite Impeller with the traditional Hotpoint side wings for drying. My Whirlpool has the standard D&M impeller, but the top rack appears to be the same as the Hotpoint. I am mostly speculating here with my comments. I wish that I had a greater knowledge of the D&M and Hotpoint lines to be able to provide a more definitive response
And on further inspection, the loops in the American Kitchens and Crosley "Roto-Tray" are strikingly similar to the top rack in this Hotpoint Portable. So, now I am a little more convinced that these were late 1950's D&M machines.
OH, and picking up on a comment that John just made regarding the screens around the Impeller on the Hotpoint and GE Dishwashers from this era and earlier - I have NEVER found, on any of my 20 or so machines, an Impeller screen, as depicted in the Use & Care Guides, and Parts Listings. It is my humble opinion that the dealers yanked these screens out of new dishwashers before installing them because they would fill up rather quickly with food particles, thus reducing significantly, the water return flow back to the impeller. Cleaning, especially on the top loading GE machines, would have required removing all of the racks to access the screen for periodic cleaning. Depending on how much pre-rinsing was done, the filter screen potentially would fill up rather quickly. Thus, there would have been a significant reduction in service calls and customer complaints regarding washability issues.
Mike
[this post was last edited: 7/26/2012-07:48]