Living in the Schenectady, NY area that centered around GE and Alco till the Welch era, I was fortunate to have seen many ideas and inventions before public release. The first portable dishwasher was made and provided to the GE President for testing and use. He had it for about 10 years. He then gave it to my aunt (his assistant) who used it at home for another 10 and at her camp for another 10 before giving it to me to fix and use. I used it for 8 years before upgrading to a built in. I believe it was built about 1947-1948, but not certain on that. All the early ones were top load. But this one had a grinder on the impeller to remove all debris. No start buttons or timer. Close the lid and away you go. Simple and log lived.