Preparing The Watch For Use - Breitling BENTLEY BARNATO RACING Manual

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
t esting Institute), a neutral and independent body which individually tests
each movement according to the prescriptions in force.
t he 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.
t he 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
coveted title of "chronometers".
chronographs carry the much-
r e It LIn g
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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. t urn the hands so
as to make the calendar jump once when the hands
pass through midnight. t hen 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!
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