Maytag top load portable dishwasher
This does appear to be an early build model. The early ones had two separate pumps one for draining one for circulating, it was a more reliable design than the next generation, and all the built-in Maytag dishwashers which had a unified motor with circulating and drain pump, which was much more Of a problem when things went wrong.
We had one of these early build models in coppertone but it got so rusty under the gasket around the top that we finally recycled it. We used to use it to wash parts in.
John