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.