This intercom is original to our mid-century modern home. When we bought the house we were told the intercom didn’t work. We turned it on and nothing happened, so we thought it was true. Later, it occurred to us that it has vacuum tubes and needs to warm up before it will work. So, we tried it again and it worked! All but one of the speakers throughout the house still works.
It has a radio, AM only, of course. It’s very difficult to tune in a station. When we have been able to get a clear signal, the only station we could pick up was conservative talk radio.
The intercom has speakers on the front and back porches. The lady who sold us the house told us her husband used to sit on the back porch and listen to baseball games through the intercom’s radio.