Jaeger-leCoultre Calibre 780 User manual

ENGLISH
Contents
Introduction 25
Accuracy and precautions for use 25
Water resistance 26
“1000 Hours Control” test 28
Technical specifications 29
Case 30
Movement 30
Functions and displays 31
Use 33
Interchangeable strap system 37
Interchangeable small buckle system 41
International Guarantee 43
Limited Warranty 47
(United States of America and Canada)
Guarantee for Australia 51

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2
6
13
7
3
8
5
15
1
11
12
10
4
14
9
1Local time hour hand
2Minute hand
3Reference time hour hand
4Seconds indicator
5Crown A 6Push-piece B
7Push-piece C 8Date window
9Chronograph minute counter
10 Chronograph hour counter
11 Chronograph seconds
12 Stop seconds catch
13 24-hour reference time indicator
14 Radial power-reserve indicator
15 Push-piece integrated into the crown

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Introduction
We would like to thank you for the confidence
you have placed in Jaeger-LeCoultre. Our
Maison has applied all its expertise and exacting
standards to the creation of this model.
We invite you to consult the operating
instructions and hope your Jaeger-LeCoultre
timepiece brings you great joy.
Accuracy and precautions for use
MANUALLY WOUND OR AUTOMATIC
MECHANICAL WATCHES
The accuracy of watch models with mechanical
movements is determined by the balance
wheel. This oscillates at a rate of 28,800
vibrations per hour. Despite all the care that the
master watchmakers of the Jaeger-LeCoultre
Manufacture have lavished on building and
assembling your watch, its accuracy is subject
to the influence of gravity, magnetic fields,
accidental impacts, and the ageing of oils.
The accuracy of a watch is measured by its
regularity of rate in various positions.
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Your individual activities could be the cause
of slight irregularities in the working of your
timepiece. If you observe a discrepancy in the
way your watch runs, we advise you to entrust it
to an authorised Jaeger-LeCoultre retailer who
will make the necessary adjustments. Watches
with mechanical movements must not be used
for sports involving significant risk of impact or
abrupt actions, such as golf or tennis.
Water resistance
Your Jaeger-LeCoultre watch is water resistant
up to 10 bar. Its water resistance can be identified
by the symbol engraved on the case-back.
This means that your model has been tested at
an overpressure of 10 bar, corresponding to an
immersion pressure of 100 metres (1 bar = ±10
metres).
In accordance with the ISO 22810/NIHS 92-20
standard, in order to guarantee the durability
of the watch’s characteristics over time, and
as water resistance may be affected by certain
activities, it is recommended that the user:

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- have the watch’s water resistance checked
by an authorised Jaeger-LeCoultre retailer
at least once every two years. It is essential
to have such a check carried out each time
your watch is opened, and before any period
in which it is liable to undergo prolonged and/
or regular immersions.
- check when making the purchase that the
bracelet is suitable for the intended use.
- avoid subjecting the watch to excessively
abrupt temperature changes.
- protect the watch from being dropped or
suffering other accidental impacts, and have
the water resistance checked after any violent
impact.
- avoid the use of the controls, push-piece,
or time-setting crown while under water, or
outside the water, if the watch is not yet dry
after immersion.
- restore the time-setting crown and the push-
pieces to their normal positions, or where
applicable, close the compression keys, after
every manipulation.
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- rinse the watch with fresh water after use in
sea water.
You may use your watch during short swims and
when jumping in from the edge of a swimming
pool, but not from a diving board. It must not
be used for scuba diving or for sports involving
significant risk of impact, such as windsurfing
or waterskiing. Also, note that leather straps are
not suited for aquatic activities.
“1000 Hours Control” test
Jaeger-LeCoultre submits all its watches to
its stringent “1000 Hours Control”, a battery
of comprehensive and rigorous internal tests
lasting a full 1000 hours.
The “1000 Hours Control” seal or legend
placed or engraved on the back of your watch
certifies that the timepiece has successfully
passed all the tests relating to regularity of
rate, temperature, atmospheric pressure, and
resistance to shocks and magnetic fields, as
well as water-resistance trials. Thus, your watch
is capable of withstanding the daily stresses
and strains that await it. The criteria of the

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“1000 Hours Control” programme considerably
exceed the standards of official timing tests,
which deal only with part of the movement.
Jaeger-LeCoultre tests not only the movement
prior to being cased up in the watch, but also
the watch once it has been assembled.
Technical specications
- Automatic movement, Jaeger-LeCoultre
Calibre 780.
- 28,800 vibrations/hour.
- Power reserve: approximately 60 hours.
- Water-resistant to 10 bar.
- Crown function selector and indicator.
- Main time zone adjustable in one-hour jumps.
- Second time zone (hour and 24-hour
indication).
- Circular indication of the 60-hour power
reserve.
- Date.
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- Small seconds (indication that the movement
is operating).
- Independent stop seconds.
- 569 parts.
Case
- Case shock-absorbing system.
- Interchangeable strap system integrated into
the case.
- Chronograph with large minute counter.
Movement
Jaeger-LeCoultre Calibre 780.

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Functions and displays
FUNCTION SELECTOR
Activated by a push-piece that is integrated into
the crown, the function selector enables several
functions to be adjusted without having to
delicately pull out the crown. Once the function
has been selected, adjustments can be made
simply by rotating the crown. In its “neutral”
position, the crown serves to wind the barrel.
One press shifts the crown to the position for
adjusting the time in the second time zone as
well as the date. Another press shifts the crown
to the position for adjusting the time in the main
time zone. Another successive press brings the
system back to its initial (neutral) position.
This system, which eliminates the need to pull
out the crown, ensures optimal water resistance
without resorting to the traditional compression
key.
Note: It is essential to return to the neutral
position after making an adjustment, as the
watch may otherwise stop.
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THE POWER RESERVE
The functions of a wristwatch clearly depend on
the energy transmitted to the movement. The
barrel of the Master Compressor Extreme LAB 2
guarantees a 60-hour power supply. To consult
the remaining power reserve at any time, a
new radial display (patent pending) featuring
a simple and intuitive read-off appears on the
circumference of the upper part of the dial.
As the power reserve gradually dwindles, the
various segments of the semi-circular indicator
move from white to red (or gold, depending on
the model). This large display mode enables
the barrel’s state of winding to be read off at a
glance, even in poor weather conditions or dim
lighting.
CHRONOGRAPH DIGITAL MINUTE
COUNTER
During endurance activities, the chronograph
minute counter is just as crucial as the seconds
hand. In order to ensure at-a-glance readability,
the watchmakers of the Manufacture have de-
veloped an instant read-off display: positioned