1) American invention 2) Antique phone part 3) Feature on some old ringers 4) Keypad forerunner 5) Old phone feature 6) Old telephone feature 
A rotary dial is a component of a telephone or a telephone switchboard that implements a signaling technology in telecommunications known as pulse dialing. It is used when initiating a telephone call to transmit the destination telephone number to a telephone exchange. On the rotary dial, the digits are arranged in a circular layout so that a fing...
a dial consisting of a disc the rotation of which produces the calling signals