WasteKing Dishwasher
Hi, your dishwasher is from approximately 1973-1975. WasteKing dishwashers were OK dishwashers in their day, but had many reliability problems which soured many consumers from purchasing them. While they did have stainless steel tanks, the stainless was of a low quality, which would eventually wear out. The seam at the back of the tank connecting the sidewalls with the lower portion often became stained with use (it is a silicone seal).
They are OK cleaners, but they have no filter. The machine eliminates food particles by utilizing several water changes; expect to see particles left on some dishes with very heavily soiled loads. A typical normal cycle uses about 15 gallons of water.
They are unique due to their washing system (the H-Axis wash tube design), and the pump does produce quite a bit of washing power. Unfortunately their pumps and detergent dispensers were not made very well, and often broke down.
I have this same model, and while I think it is a cool & unique machine I would never use it as a daily driver. The washing system limits the way the racks can be loaded, and their is no room for tall items like cookie sheets, large fry pans, etc. One of our members in the SF bay area had one of the later models with the steam feature and really did not like it (although it was nice looking machine). I believe he had the Thermador version, but it was essentially the same machine.
At the time this was made WasteKing & Thermador were basically siblings underneath their skin. When Bosch acquired the Thermador line of appliances they eliminated these designs and rebadged some of their appliances with the Thermador name; the WasteKing brand was eliminated (except for the Garbage Disposers, which was sold to Anaheim manufacturing).
You can try using it, but I wouldn't expect stellar results or a very user friendly experience when it comes to loading. I have service literature for these machines, and an operating guide for this model, if you want. Let me know & I can scan it to you.
Good luck & let us know what you decide to do.