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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 movement’s
performances must meet 7 very strict criteria, including a daily variation in
rate ranging between only –4/+6 seconds.
The term “chronometer” should not be confused with that of “chronograph”,
which is a complicated watch fitted with an additional mechanism enabling
the measurement of the duration of an event. A chronograph is not neces-
sarily chronometer-certified, but all B
REITLING
chronographs carry the much-
coveted title of “chronometers”.
PREPARING THE WATCH FOR USE
WINDING – TIME-SETTING
1. Wind the watch by 40 clockwise turns of the
crown.
2. Pull the crown out to position 2, turn it clockwise
to adjust the calendar to the day prior to the date
when it is set into operation.
3. Pull the crown out to position 3. Turn the hands
so as to make the calendar jump once when the
hands pass through midnight. Then adjust the
hour and minute.
4. Push the crown back to position 1.
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