Jaeger-leCoultre DUOMETRE QUANTIEME LUNAIRE User manual

ENGLISH
CONTENTS
Introduction 21
Accuracy and precautions for use 21
Water resistance 22
“1000 Hours Control” test 25
Technical specifications 26
Movement 27
Use 30
International Guarantee 34
Limited Warranty 38
(United States of America and Canada)
Guarantee for Australia 42
Customer Service 47

20
1
2
3
4
5
6
9
8
7
10
11
1Minute hand
2Hour hand
3Crown
4Power reserve of the functions
5Jumping seconds hand
6Power reserve of the regulator
7Seconds hand
8Date hand
9Moon phase aperture
for the northern hemisphere
10 Date correction push-piece
11 Moon phase corrector in the horn gap

ENGLISH
21
INTRODUCTION
We would like to thank you for the confi-
dence 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 in-
structions 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 me-
chanical movements is determined by the
balance wheel. This oscillates at a rate of
21,600 vibrations per hour. Despite all the
care that the master watchmakers of the
Jaeger-LeCoultre Manufacture have lav-
ished on building and assembling your

22
watch, its accuracy is subject to the influ-
ence of gravity, magnetic fields, accidental
impacts, and the ageing of the oils. The ac-
curacy of a watch is measured by its regu-
larity of rate in various positions.
Your individual activities could be the
cause of slight irregularities in the working
of your timepiece. If you observe a discrep-
ancy in the way your watch runs, we advise
you to entrust it to an authorised Jaeger-
LeCoultre retailer who will make the nec-
essary adjustments. Watches with me-
chanical 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 to 5 bar. Its water resistance can
be identified by the symbol and/or
the engraving: “5 bar” on the caseback.
This means that your model has been
tested at an overpressure of 5 bar, corre-

ENGLISH
23
sponding to an immersion pressure of 50
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
aected by certain activities, it is recom-
mended that you:
- have the watch’s water resistance checked
by an authorised Jaeger-LeCoultre retailer
at least once every two years. It is essen-
tial to have such a check carried out each
time your watch is opened, and before any
period in which it is liable to undergo pro-
longed 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
suering other accidental impacts, and
have the water resistance checked after
any severe impact.

24
- avoid using 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.
- rinse the watch with fresh water after use
in sea water.
You may use your watch while swimming
as long as you do not exceed the immer-
sion pressure and do not engage in any
water sports that could cause impacts.
This watch is not a piece of diving equip-
ment and should not be used as such. Also,
note that leather straps are not suited for
aquatic activities.

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25
“1000 HOURS CONTROL”
TEST
The Jaeger-LeCoultre Manufacture pays
close attention to the quality and to the
final checks of its watches.
The 1000 Hours Control is a series of in-
ternal qualification tests for each of the
models in our collection, as well as inter-
nal tests on the production of your watch,
which go beyond ocial timing tests.
These tests include checks of the move-
ment before and after being cased up
in the watch and cover the whole watch
once it has been assembled, in the condi-
tions closest to daily wear.
The “1000 Hours Control” legend, or the
“” seal engraved on the back of the
watch certifies that each of the models
from our collection has successfully under-
gone all of the qualification tests, and that
your watch has successfully undergone
all of the production tests. These ensure
regularity of rate, resistance to variations

26
in temperature and atmospheric pressure,
ability to withstand shocks and magnetic
fields, as well as water resistance.
TECHNICAL
SPECIFICATIONS
- Manually wound mechanical movement,
Jaeger-LeCoultre Calibre 381 Dual-Wing
- 21,600 vibrations/hour.
- Power reserve of the regulator:
approximately 50 hours.
- Power reserve of the functions:
approximately 50 hours.

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27
MOVEMENT
Jaeger-LeCoultre Calibre 381.
Important note regarding the power re-
serves of the Calibre 381 Dual-Wing.
The Dual-Wing movement of the Duo-
mètre Quantième Lunaire watch model
features two barrels. The first barrel pro-
vides the watch’s regulator (regulating or-
gan) with 50 hours of power reserve. The
second barrel, which is independent from
the first, provides all the watch’s functions
with 50 hours of power reserve. The func-
tions, thus, do not cause any loss of ener-
gy or isochronism in the escapement.
The regulator’s power reserve is indicated
by the blue triangle positioned between
7 and 8 o’clock. The functions’ power re-

28
serve is indicated by the blue triangle po-
sitioned between 4 and 5 o’clock.
In both cases, the power reserve is at its
maximum when the triangle is positioned
opposite the “50” symbol. As energy is
consumed, the triangle will gradually point
towards the “0” symbol. When the triangle
is opposite the “0” symbol (after approxi-
mately 50 hours for both the escapement
and the functions), this indicates that the
power reserve has been exhausted. This is
the last chance to wind up the watch wit-
hout losing the settings.
Both barrels can be wound using crown,
in position 0. To wind the escapement
barrel (and conse-quently its power re-
serve), turn the crown clockwise. To wind
the functions barrel (and consequently its
power reserve), turn the crown anti-clo-
ckwise.

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29
Important:
Although the two power reserves are in-
dependent, it is vital that both are wound
before the timepiece can be used.
If one of the power reserves is depleted,
the movement will stop (no damage will
be caused to the movement). It will thus
be necessary to wind the two power re-
serves according to the instructions to
restart the calibre.
IDENTIFYING THE SECONDS HANDS
The Duomètre Quantième Lunaire watch
features two seconds displays. The first is
the central hand, while the second is the
jumping seconds hand at 6 o’clock, which
gives an indication to 1/6th of a second.

30
USE
0
A
B
12
STARTING THE WATCH
Crown in position 0.
The watch is started by turning the crown
clockwise to wind the escapement power
reserve and anti-clockwise to wind the
functions barrel. The watch is fully wound
when the two power reserve hands have
reached the “50” symbol. There is no stop
to tell you that the movement has been
fully wound, as excess winding is ab-

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31
sorbed by a slipping spring. This prevents
damage to the gear-train.
SETTING THE TIME
The Duomètre Quantième Lunaire watch
fea-tures a unique resetting mechanism
for the seconds and jumping seconds
hands, called the “jumping stop-seconds”.
This enables the two hands to be reset by
the crown and for the time to be set on
the watch once an hour signal sounds to a
precision of 1/6th of a second.
Pull crown out to position 1. The jumping
seconds hand returns to zero and stops
in preparation for the time-setting opera-
tion. Note that the escapement continues
to function, thanks to its dedicated power
reserve. Its isochronism is undisturbed.
Pull crown out to position 2. The central
seconds hand returns to zero in turn and
stops in preparation for the time-setting
operation. Note that the escapement
continues to function thanks to its dedi-

32
cated power reserve. Its isochronism is un-
disturbed.
Release the crown, which returns auto-
matically to position 1. The two seconds
hands are locked at 0. Note that the esca-
pement continues to function thanks to its
dedicated power reserve. Proceed to set
the hours and minutes and, on the hour si-
gnal, push the crown back into position 0.
The watch starts running again.
SETTING THE DATE
The Duomètre Quantième Lunaire watch
displays the date with a hand positioned
at 9 o’clock. It is corrected using a push-
piece at 10 o’clock(A), which allows one-
day jumps.
SETTING THE MOON PHASE
The Duomètre Quantième Lunaire watch
indicates the moon phases of the northern
hemisphere in an aperture.

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33
In order to correct the moon phases, press
the moon phase corrector positioned in
the horn gap at 12 o’clock(B) using the
corrector tool provided.
Each press moves the disc one day forward.
In order to correct the moon phases accu-
rately, calculate the number of days that
have elapsed since the last full moon using
the calendar at the end of this user manual
and, using the corrector provided, centre
the moon in the aperture, then move the
disc forwards according to the number of
days that have elapsed since the last full
moon.
Note: Date correction should not be per-
formed between 10 p.m. and 3 a.m. This
is because the automatic date-change
mechanism is already in action between
these times.

34
JAEGER-LECOULTRE
WATCHES
In order to benefit from the Internation-
al Guarantee and/or the Limited War-
ranty and/or the Manufacturer’s Guar-
antee for Australia, Jaeger-LeCoultre
products must be purchased exclusively
from authorised Jaeger-LeCoultre retail-
ers or from Jaeger-LeCoultre Boutiques.
Maintenance and repair work must be en-
trusted to an authorised Jaeger-LeCoultre
retailer, a Jaeger-LeCoultre Boutique, or
an authorised Jaeger-LeCoultre Service
Centre. If these conditions are not met,
the manufacturer’s guarantee does not
apply. Please contact Jaeger-LeCoultre
to obtain the list of authorised Jaeger-
LeCoultre retailers across the world.

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35
INTERNATIONAL
GUARANTEE
The International Guarantee applies to
Jaeger-LeCoultre products sold or pre-
sented for guarantee repairs in all coun-
tries, except the United States of Ameri-
ca and Canada (for these two countries,
see the Limited Warranty) and Australia
(for this country, refer to the Guarantee
for Australia).
TERMS AND CONDITIONS OF
THE J AEGER-LE C OULTRE
INTERNATIONAL GUARANTEE
Your Jaeger-LeCoultre watch is guaran-
teed to protect against all manufacturing
defects for two years from the date of pur-
chase, subject to the following conditions.
Any part found by our technical services
to be defective as a result of a manufac-
turing defect will, at the sole discretion of
Jaeger-LeCoultre, be repaired or replaced
free of charge. The Jaeger-LeCoultre In-

36
ternational Guarantee is valid only if the
guarantee certificate enclosed with this
booklet has been duly completed, dated,
stamped, and signed by the authorised
Jaeger-LeCoultre retailer or the Jaeger-
LeCoultre Boutique, which sold you your
watch.
The Jaeger-LeCoultre International Guar-
antee does not cover defects resulting
from accidents, mishandling, or incorrect,
abusive use (for example, knocks, dents,
crushing, excessive temperatures, power-
ful magnetic fields), the use of or eect
of using batteries other than those des-
ignated by Jaeger-LeCoultre, unauthor-
ised alteration or repair, the consequences
of normal wear and ageing of the watch,
strap, or glass, the loss of water resistance
after two years from the date of purchase,
if your watch is water-resistant, or any de-
fect resulting from contact with water, if
your watch is not water-resistant.
Jaeger-LeCoultre water-resistant watches
can be identified by the symbol and/or

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37
by “3, 5, 10, or 20 bar” (or another number
depending on the model) engraved on
the caseback. Their water resistance is
guaranteed for two years from the date
of purchase, provided that the glass, bez-
el, back, middle part, and crown have not
been damaged. It is nevertheless essen-
tial to have the water resistance of your
watch checked at least once every two
years, and in any event, prior to any period
of intensive use, either by an authorised
Jaeger-LeCoultre retailer, a Jaeger-
LeCoultre Boutique, or an authorised
Jaeger-LeCoultre Service Centre (for
further information please see your User
Manual).
For quartz watches, this guarantee does
not cover the battery life.
As a consumer, you may have legal rights
under applicable national legislation gov-
erning the sale of consumer goods; those
rights are not aected by this guarantee.

38
LIMITED WARRANTY
(UNITED STATES OF
AMERICA AND CANADA)
The following Limited Warranty applies to
Jaeger-LeCoultre products sold or pre-
sented for warranty repairs in the United
States of America and Canada only.
TERMS AND CONDITIONS OF
THE J AEGER-LE C OULTRE
LIMITED WARRANTY
Your Jaeger-LeCoultre watch is guaran-
teed against all manufacturing defects for
two years from the date of purchase, sub-
ject to the following conditions. Any part
found by our technical services to be de-
fective as a result of a manufacturing de-
fect will, at the sole discretion of Jaeger-
LeCoultre, be repaired or replaced free of
charge. The Jaeger-LeCoultre Limited War-
ranty is valid only if the warranty certificate
enclosed with this booklet has been duly