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Logo of the official Swiss chronometer testing agency COSC

Watch type

(Greek: Chronos = time, metrein = to measure: very accurate timepiece)

A chronometer is a precision watch that is regulated in different positions and at different temperatures, and which has received an official certificate of the performed chronometer certification by a neutral official authority.

The development of chronometers began with an announcement of the British Parliament in the year 1714: the Act of the Queen Anne (Act of Parliament).


For more details and history of the official chronometer certification, see: