I don't recall radios that used a screw to set the buttons. The first car my family owned that had a radio was a 1954 Ford, and its radio used the "pull, push" method.

The first telephone I remember had a 5-digit number, and was on a ten-party line. Amazingly, I still remember that number. I also still remember the 7-character number (2 letters, 5 numbers) that it was changed to.