Grandpa's Zenith radio

This Zenith was found while cleaning out Grandma's estate. It was in the garage, so I assume it belonged to my grandfather. Believe it or not, it still works - original cord and all!! I think it is really neat. I plugged it in and tuned it into a station. When I went to turn it off, it wouldn't shut off with the knobs. I kept looking it over and over trying to figure out how to shut it off . I closed the lid and, to my surprise, it turned off!!! Who would have thought???