Water resistance
Jaeger-LeCoultre Master Compressor Geographic watches
are water-resistant to 10 bar/atm. This property can be iden-
tified by the
symbol engraved on the case-back. This
means that you can use your watch during short swims or
when diving in from the edge, but not from a diving board.
Nor should it be used for undersea 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.
Furthermore, it is essential to have your watch’s water-resis-
tance checked by an authorised Jaeger-LeCoultre retailer at
least once every two 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.
Compression keys
Equipping the crowns of the Master Compressor line models,
the patented compression key system can apply strong com-
pression to one of the 4 crown seals, thereby ensuring impec-
cable long-term water resistance.
The “open” or “closed” position of the compression key is
indicated by the arrow symbols (viewed from the dial side) :
- The compression key is in the compressed seal position
(“closed”) if the indication is a white arrow; the keys must
be closed when you wear your watch and when you are
taking part in sports. You must not make any adjustments
or set the time in this position, since this might damage the
gaskets.
- The compression key is in the non-compressed seal posi-
tion (“open”) if the indication is represented by two red
arrows; in this configuration, you may proceed to start the
watch and adjust the functions according to the indications
below.
The transition from the “closed” to the “open” position, or
vice-versa, is performed by turning the key using the wing-
nuts in the direction indicated by the arrow(s).
Note
The water-resistance function of the compression key is sepa-
rate from the operation of the crown itself. Even in closed
position, the key does not lock the crown. It is thus in practice
possible to handle the crown when the key is in the com-
pressed seal position. However, as mentioned earlier, it is
extremely inadvisable to make adjustments in this position,
since this might damage the seals. We recommend that you
first turn the compression key to the “open” position before
performing any adjustments on your watch.
Wing-nuts
Compressed seal position or
"closed" position
Non-compressed seal position or
"open" position
M
aster
C
oMpressor
G
eoGraphiC
- English
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