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YOUR BREITLING CHRONOMETER
A chronometer is a high-precision instrument that has successfully passed
the entire battery of tests imposed by the COSC (Swiss Official Chronometer
Testing Institute), a neutral and independent body which individually tests
each movement according to the prescriptions in force.
The certification test for wristwatches with sprung balance oscillators,
according to the ISO 3159 norm, consists of observing each movement for
15 days and 15 nights, in 5 positions and at 3 different temperatures (8°,
23°C, 38°C). In order to earn the prestigious chronometer label, a move-
ment's performances must meet 7 very strict criteria, including a daily vari-
ation in rate ranging between only –4/+6 seconds.
The term "chronometer" should not be confused with that of "chrono-
graph", which is a complicated watch fitted with an additional mechanism
enabling the measurement of the duration of an event. A chronograph is
not necessarily chronometer-certified, but all Breitling chronographs carry
the much-coveted title of "chronometers".
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PREPARING THE WATCH FOR USE
SETTING THE WATCH TO HOME TIME
1. Wind the watch by means of around 40 clockwise
crown rotations.
2. Pull the crown out to position 2 and adjust the date by
turning the 24-hour disk forwards or backwards. The
date changes with each complete rotation of the disk.
Upon reaching the correct date, continue turning the
24-hour disk until the hour hand is positioned around
12 o'clock.
Then turn the city disk forwards or back-
wards in order to position the home city
facing the 12 o'clock marker on the dial
(Paris in this example) by means of the
shortest possible rotation.
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