YOUR BREITLING CHRONOMETER
A chronometer is a high-precision instrument that has successfully passed
the entire battery of tests imposed by COSC (Swiss Offi cial Chronometer
Testing Institute), a neutral and independent body which individually tests
each movement according to the prescriptions in force.
The certifi cation test for wristwatches with sprung balance oscillators,
according to standard ISO 3159, consists of observing each movement for
15 days and 15 nights, in 5 positions and at 3 different temperatures (8°C,
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 "chrono-
graph", which is a complicated watch fi tted with an additional mechanism for
measurement of the duration of an event. A chronograph is not necessarily
chronometer-certifi ed, but all Breitling chronographs bear the much-coveted
title of "chronometer".
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PREPARATION FOR USE
WINDING – TIME-SETTING
1. Wind the watch through approximately 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 activation
date.
3. Pull the crown out to position 3. Turn the hands
forward 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 into position 1.
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