Cannot be sure but one may have seen that old coin payment system before.
Instead of controlling washer or dryer, coins control power to machines. Much like coin meters in UK or other parts of Europe where one had to pay to turn on gas or electric.
Fun to see other makes & brands and able to identify them having watched the shows.
Would laundrie areas still be like this now in apartment blocks ie different washers & dryers as and when required or fitted out with the same washers & dryers like mini launderette ?
Most places today would have a "route" company so washers and dryers would come from same brand. Though there could be a mix depending upon what sort of equipment property owner believes best would suit needs.
I think they made the same mistake on Green Acres, looks like a Westinghouse (or Norge?)Combo and we know it was also a Maytag Combo, but who cares! It was an anarchic show and why shouldn't the Douglas' kitchen have riotously badly painted Pink Combos side by side. We would expect nothing less from the storehouses of Mr. Haney.
Reading this the other day got me to watching a couple of the old Rhoda shows on Youtube.. One was I think entitled Rhoda Meets the Ex-Wife. where she goes to meet husband Joes ex.. (played by Joan Van Ark) It was hilarious, albeit because of Ida (Nancy Walker) .. I'l link it below.