Jaeger-leCoultre 868 Manual de usuario

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Table of Contents

Introduction 21

Accuracy and precautions for use 21

Water resistance 22

“1000 Hours Control” test 24

Technical speciﬁcations 25

Movement 26

Functions and displays 26

Use 29

International Guarantee 35

Limited Warranty 39

(United States of America and Canada)

Guarantee for Australia 43

Jaeger-LeCoultre Customer Service 47

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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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 the oils.

The accuracy of a watch is measured by its

regularity 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 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 5 bar. Its water resistance can be identified

by the symbol and/or the engraving: “5

bar” on the case-back. This means that your

model has been tested at an overpressure of

5 bar, corresponding 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

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as water resistance may be affected by certain

activities, it is recommended that you:

- 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 severe

impact.

- 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 immersion

pressure and do not engage in any water sports

that could cause impacts. This watch is not a

piece of diving equipment and should not be

used as such. Also, note that leather straps are

not suited for aquatic activities.

“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 internal

qualification tests for each of the models in

our collection, as well as internal tests on the

production of your watch, which go beyond

official timing tests. These tests include checks

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of the movement before and after being cased

up in the watch and cover the whole watch

once it has been assembled, in the conditions

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 undergone 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

in temperature and atmospheric pressure,

ability to withstand shocks and magnetic fields,

as well as water resistance.

Technical specications

- Self-winding mechanical movement,

Jaeger-LeCoultre Calibre 868.

- 28,800 vibrations/hour.

- Power reserve: approximately 38 hours.

Movement

Jaeger-LeCoultre Calibre 868.

Functions and displays

The watch oers the following functions:

- Hours

- Minutes

- Seconds

- Date

- Day

- Month

- Year

- Moon-phases

- Perpetual Calendar

- Security zone indication

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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 mechanically, without the slightest

need for readjustment until 1 March 2100.

All these are interlinked by the ingenious

mechanism of a genuine, entirely mechanical

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 quarter

(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 February.

For the sake of greater precision, this exclusion

does not take place when the number of

centuries is divisible by 4. Such is the case for

the years 2000 and 2400 (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 corrected. 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 varies by

one day in every 122 years.

The Master Ultra Thin Perpetual’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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