History of Watchmaking

In the early 1920st. a type of wristwatch for pilots was developed known as an hour-angle watch. All the watch manufacturers then specialising in aeronautics, including IWC, Jaeger LeCoultre, Lange & Söhne, Longines and Vacheron Constantin proposed models that could be used to determine longitude.

World history

Observing that "communism of war" was an economic and social failure, at the tenth Communist Party Congress, Lenin announced the introduction of a new economic policy ("Novaïa Ekonomitcheskaïa Politika").

Swiss history

Geneva became the sixth canton to propose the introduction of women’s suffrage, a proposition that was only enacted in 1971.

Art and Culture

First screening in the United States of The Kid, with Charlie Chaplin and child actor Jackie Coogan.