I don't know if they sold Westinghouse-based dishwashers at the same time as Frigidaire like they did for other appliances. I have a Wards dishwasher by Frigidaire from the mid-1970s, this one is probably a bit older.
I think it's funny that Wards was able to count one more level of washing than Frigidaire's already optimistic "5 LEVEL WASH"!
The 3rd picture shows a RCA-branded Westinghouse portable dishwasher to show some similarities.