Accuracy
Mechanical models with manual or automatic
winding
The precision of the mechanical models is determined by the
balance. The latter performs 21,600 or 28,800 vibrations per
hour depending on the model (see technical characteristics).
Despite all the care that the Jaeger-LeCoultre master-
watchmakers have lavished on making and assembling your
watch, its accuracy is subject to the influence of gravity, mag-
netic fields, shocks, as well as ageing of the oils. This accuracy is
measured by its rate regularity in various positions.
The nature of your temperament and of your daily activi-
ties may cause slight variations in timekeeping. If you were to
notice that your watch is running slow or fast, we advise you
to take it to an approved Jaeger-LeCoultre retailer, who will
make any necessary adjustments.
Quartz models
The quartz models are accurate to within 2 to 3 minutes
per year.
Jaeger-LeCoultre quartz watches contain a battery
and electronic components. When performing
maintenance, your official Jaeger-LeCoultre Service
Centre or your authorised Jaeger-LeCoultre retailer
will take charge of their recovery and disposal in accordance
with the standards in force.
Water resistance
Jaeger-LeCoultre Reverso watches are water-resistant to
3 bar/atm. This property is identifiable by the
symbol
engraved on the case-back. This means that you can use your
watch for short swims, and when diving from the poolside,
but not from a diving board. It must not be used either for
scuba diving or for sports where there are significant risks of
hard knocks, such as windsurfing and waterskiing. Please also
note that leather straps are not suitable for aquatic activities.
It is also essential to have the water resistance of your watch
regularly checked by an authorised Jaeger-LeCoultre retailer
at least once every 2 years, and definitely before any period
in which it will undergo prolonged and / or regular immersion.
The «1000 Hours Control» test
by Jaeger-LeCoultre
Jaeger-LeCoultre subjects each of its watches to the rigourous
«1000 Hours Control» test programme. Unique in its kind,
this test consists of 1000 hours of comprehensive, stringent
checks.
The «1000 Hours Control» seal or marking affixed or
engraved on the back of your watch certifies that it has
undergone this observation programme in our laboratories
and has passed all the tests, relating to rate regularity, tem-
perature and atmospheric pressure, resistance to impacts
and magnetic fields, as well as water-resistance. Your watch
is therefore capable of withstanding the trials awaiting it in
everyday life when you wear it on your wrist.
The criteria of the «1000 Hours Control» programme go far
beyond the official timekeeping test standards, which concern
only part of the movement. Jaeger-LeCoultre tests not only
the movement before casing it within the watch, but also the
watch as a whole.
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