Breitling SUPEROCEAN GMT, User Manual

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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
Nota bene: mechanical watches endowed with a date, day,
month or moon-phase indicator are equipped with a complex
mechanism that is set into motion between 8 pm and 3 am. It is
therefore vital to avoid adjusting the calendar or moving the
time backwards during this period.
1. Unscrew the water-resistant crown in an anti-clock-
wise direction. Wind the watch by 40 clockwise turns
of the crown.
2. Pull the crown out to position 2, turn it anti-clock-
wise 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. Press it gently,
turning it gently in a clockwise direction, then tigh-
ten it again until you feel some resistance. Do not
force!