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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 COSC (Swiss O cial Chronometer Testing Institute), a neutral
and independent body which individually tests each movement according to the pre-
scriptions 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 di erent 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 "chronograph", which is a
complicated watch fi tted with an additional mechanism for measurement of the dura-
tion of an event. A chronograph is not necessarily chronometer-certifi ed, but all Breitling
chronographs bear the much-coveted title of "chronometer".
PREPARATION FOR USE
WINDING – TIME-SETTING
1. Wind the watch through approximately 40 clockwise turns of the
crown.
2. Pull the crown out to position2, turn it clockwise to adjust the
calendar to the day prior to the activation date.
3. Pull the crown out to position3. 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 position1.
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