We've been watching this old 1979 British series set in WW2. (No subtitles or CC, but since Anita's parents were British, she's able to translate for me.) Plenty of old phones, but this one stood out. In the scene, the officer pushes the button and you hear a coin drop. Apparently you have to push the button at just the right moment to get through because he pushes it very quickly. On the other end of the line is his mistress talking on a stick.