Yes, D&M was the only company that ever made a Roto-Rack DW, cool machine disappointing washing results and VERY poor durability, quality of materials and finishes was also sub-par.
But diffidently a great machine for DW collectors, we have both a portable and a 240 volt built-in in our collection, although I have never seen any other appliance deteriorate so much just sitting in our climate controlled warehouse, LOL.
That's a nice one, indeed! I suspect that with a regular wash arm instead of an impeller as the main water source, this would still do a decent cleaning job. I'm also guessing this was getting toward the end of the line for Kenmore top-loaders....