This is an old electro-mechanical Teletype machine (Model 20) printing out a news feed. These machines were used by newspapers and radio stations to receive news stories from organisations like the Associated Press and United Press International (UPI). They were made obsolete by computerized news delivery and were largely gone by the late 70s.
This is part of the Obsolete Sounds project, the world’s biggest collection of disappearing sounds and sounds that have become extinct – remixed and reimagined to create a brand new form of listening. Explore the whole project at https://citiesandmemory.com/obsolete-sounds
