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Bureau officiel des chronomètres (BO), logo
History of Watchmaking
Foundation in Biel of the first Swiss institution to officially control watch rates, acknowledged as the official watch observation bureau in 1893 and now the Bureau officiel des chronomètres (BO).
Wristwatches produced in small series appeared in Vienna (Austria).
World history
1879. Thomas Edison made the first incandescent lightbulb.
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