I found this 4-slot "Mary Proctor" model P21601 toaster in the basement of a home this morning. It was pretty dusty, but I could see the chrome underneath was in good condition. It cleaned up nicely.
However, when I plugged it in, nothing. Toasters are fairly basic, particularly these manual plunge toasters, so I knew it couldn't be anything too complex. Removing the rear base where the cord goes in, I found one of the spade connectors for the power cord had simply come off. Putting that back in place, the toaster fired right up. Given the nice condition, I'm guessing the connector came loose early in this toaster's life and the owner said, "Honey, the toaster quit working, can you pick up another one next time you're at the store?" and put this toaster in their basement for the next 50 years.
The toaster has separate plungers and toasting level controls so you don't have to heat all 4 slots for just 2 pieces of toast. You can also have separate settings if someone in the house likes their toast a little darker or lighter.
There are additional "Color Tuners" on the bottom in case the slide adjuster is off.