Jisho

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くろでんわ 黒電話
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Noun
1. black rotary-dial telephone​
Wikipedia definition
2. Rotary dial​The rotary dial is a device mounted on or in a telephone or switchboard that is designed to send electrical pulses, known as pulse dialing, corresponding to the number dialed. The early form of the rotary dial used lugs on a finger plate instead of holes. Almon Brown Strowger filed the first patent for a rotary dial, U.S. patent #486,909, on December 21, 1891, that was later issued to him on November 29, 1892.
Read “Rotary dial” on English Wikipedia
Read “黒電話” on Japanese Wikipedia
Read “Rotary dial” on DBpedia

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