Jaeger-leCoultre MASTER ULTRA THIN PERPETUAL CALENDAR User manual

ENGLISH
CONTENTS
Introduction 23
Accuracy and precautions for use 23
Water resistance 24
“1000 Hours Control” test 27
Care instructions for leather straps 28
Technical specifications 29
Movement 29
Functions and displays 30
Use 33
International Guarantee 40
Limited Warranty 44
(United States of America and Canada)
Guarantee for Australia 48
Customer Service 53

22
1
2
6
5
3
4
11
10
9
7
8
1Moon phases
2Minute hand
3Aperture indicating the security zone
4Crown
5Date
6Month
7Year
8Corrector
9Second hand
10 Day
11 Hour hand

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23
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
28,800 vibrations per hour. Despite all the
care that the master watchmakers of the
Jaeger-LeCoultre Manufacture have lav-
ished on building and assembling your

24
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-

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25
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.

26
- 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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27
“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

28
in temperature and atmospheric pressure,
ability to withstand shocks and magnetic
fields, as well as water resistance.
CARE INSTRUCTIONS
FOR LEATHER STRAPS
1. Keep the leather strap in a dry place
2. Avoid contact with water, cosmetics,
perfumes, alcohol and oily materials
3. To prevent leather from discolouring,
avoid wearing the watch:
- in a highly humid environment
- during a sporting activity: sweat dam-
ages the leather
- in prolonged exposure to sunlight
4. Wipe with a dry and soft fabric. Do not
dry in direct sunlight or near heat sources

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29
TECHNICAL
SPECIFICATIONS
- Automatic mechanical
Manufacture movement,
Jaeger-LeCoultre Calibre 868.
- 28,800 vibrations/hour.
- Power reserve: approximately 38 hours.
MOVEMENT
Jaeger-LeCoultre Calibre 868.

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FUNCTIONS AND
DISPLAYS
The watch oers the following functions:
- Hours
- Minutes
- Seconds
- Date
- Day
- Month
- Year
- Moon phases
- Perpetual Calendar
- Security zone indication
The perpetual calendar has a mechanism
that takes into account the length of the
current month (28, 30 or 31 days), and
counts a 29th February every leap year.
The date, day of the week, month, year,
and moon phase are therefore indicated

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mechanically, without the slightest need
for readjustment until 1 March 2100.
All these are interlinked by the ingenious
mechanism of a genuine, entirely mecha-
nical programme: merely changing the
initial date thus eects the appropriate
changes in all other functions.
Our time measurement is based on the
Gregorian calendar, i.e. a year of 365 days,
5 hours, 48 minutes, and 46 seconds, or
in decimals, 365.242192 days. In practice,
the yearly excess of just less than a quar-
ter (0.242192) of a day is corrected by
the 29th February in leap years. The few
missing decimals are then compensated
for every 100 years, by excluding 29th Fe-
bruary.
For the sake of greater precision, this ex-
clusion does not take place when the nu-
mber of centuries is divisible by 4. Such
is the case for the years 2000 and 2400

32
(centuries divisible by 4), which are both
regular leap years. It is therefore only in the
year 2100 that the programming of your
perpetual calendar will need to be correc-
ted. Until that date, your watch will count
days, months, and decades. On 1 March
2100, the calendar will indicate Monday,
29th February, whereas in fact it will be
Monday, 1st March. A watchmaker will then
have to set your watch to the correct date,
together with the moon phase, which va-
ries by one day in every 122 years.
The Master Ultra Thin Perpetual Calen-
dar’s crown allows you to:
- Wind the watch if it has not been worn
for more than 38 hours.
- Set the desired time.

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33
USE
01
WINDING
Your Master Ultra Thin Perpetual Calendar
watch is equipped with a 38-hour power
reserve, during which time it can operate
without any additional winding.
Crown in position 0.
A few clockwise turns of the crown are
enough to set the watch running. It will
then automatically wind up when you
wear it. Please note that the crown does

34
not lock during winding, even when the
watch is fully wound.
SETTING THE HOURS AND MINUTES
Pull the crown out to position 1.
Move the hands clockwise until the desired
time is displayed. When the hands are dis-
playing times during the night between
8 p.m. and 4 a.m., with what is known as
the security zone in red, you must never:
- Turn back the hour or minute hands.
- Perform a date correction.
When the operation is complete, push the
crown back to position 0.
Special nature of the four-digit year indi-
cator:
The year is indicated via four positions.
The display of the year’s first two digits
(the century) is fixed. It consists of a small
two-position plate, screwed onto the mo-
vement, which can indicate “20” or “21”.
The decade display consists of two dis-

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35
cs which run through the positions from
“00” to “99” according to the perpetual
calendar mechanism. On 1 January 2100,
the watch will therefore indicate the year
2000 (fixed “20” + “00”). We advise you to
wait until 1 March 2100 before submitting
your Master Ultra Thin Perpetual Calendar
watch to an authorised watchmaker, so as
to have the year plate set to position “21”,
while the necessary adjustments are made
to the date and the moon phase.
SIMULTANEOUS CALENDAR
(DAY, DATE, MONTH, AND YEAR)
AND MOON PHASE ADJUSTMENT
This operation is entirely controlled by a
single corrector located at 8 o’clock, which
can be operated via the corrector tool
supplied with the watch. Each press of the
tool moves the calendar one day forward.
Therefore all that’s needed is to set the
initial calendar by pressing the push-piece
until the corresponding date and month
are displayed, to ensure that the day, date,

36
month, year, and moon phase programme
run correctly thereafter.
We remind you that you should not:
- Perform this calendar correction between
8 p.m. and 4 a.m..
- Move the calendar forward beyond the
current date. The movement is program-
med mechanically and cannot be ad-
justed by moving the date backward.
If the calendar is accidentally moved
forward beyond the current date, you
have two options:
- Wait for the power-reserve to run out.
The watch will stop.
- Wait until the day of the inadvertently pro-
grammed date before winding the watch.
To set your Master Ultra Thin Perpetual
Calendar watch, there is no need to know
whether or not the year is a leap year, nor
the current moon phase. Nor is it necessa-
ry to set the day of the week, because this

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37
data is automatically programmed in your
watch.
ADJUSTING THE WATCH
WHEN CHANGING TIME ZONES
(OR WHEN SWITCHING FROM
DAYLIGHT SAVING TIME TO WINTER
TIME AND VICE VERSA)
Pull the crown out to position 1.
- If you are travelling towards the East,
move the hour forward to display the
new local time.
- If you are travelling towards the West,
turn the hands back, but without ever
going beyond 4 a.m., at which point the
red security zone reappears in the aper-
ture. If this situation arises, wait to make
the correction until a time when this is
possible.
ADJUSTING THE WATCH FOR
A DATE CHANGE
Pull the crown out to position 1.
When changing date while travelling

38
towards the West, such as going from
America to Asia, you move on to the next
day:
- Adjust your watch by moving the hands
forward until you reach the following day
and the local time.
- You can also use the corrector push-
piece to move the date forward.
When changing date while travelling
towards the East, you move back to the
previous day:
In this case, however, the watch will indi-
cate one day earlier.
This date display error can be corrected by
twice turning the hands back by 12 hours
each time, so as not to go back beyond
the security zone (i.e. between 8 p.m. and
4 a.m.).
The correction is performed as follows:
- The first 12-hour windback is performed
in the afternoon between 4 p.m. and 8
p.m. For example, if you perform this

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39
operation at 8 p.m., the day/night indi-
cation dial of your watch will show 8 a.m.
instead of 8 p.m. after this first turn.
- The second 12-hour windback is perfor-
med the following morning between 4
a.m. and 10 a.m. For example, if you per-
form this operation at 8 a.m., your watch
will once more display 8 a.m. (current
time with the correct date).
The date indicator will once more be syn-
chronised with the local date.

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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.