The «1000 Hours Control» test
by Jaeger-LeCoultre
Jaeger-LeCoultre subjects its watches to the rigorous
«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 successfully passed all tests. The latter include rate
regularity checks, reactions to changes in temperature and
barometric pressure, resistance to shocks and magnetic fields,
as well as water-resistance tests. Your watch is therefore capa-
ble of withstanding the trials of 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 in the watch, but also the fully
assembled watch.
Technical characteristics
- Manually-wound mechanical movement, ultra-thin,
Calibre 849.
- 21,600 vibrations/hour.
- Power reserve : approximately 35 hours.
Movement
Use
Winding
Winding is performed by turning the crown clockwise. The
watch is fully wound when the crown locks.
Do not attempt to wind a manually-wound watch beyond
the locking point.
To ensure good operating accuracy, it is advisable to wind
your watch regularly, at least once a day.
Time setting
Pull the crown out to position 2.
Move the hands clockwise until the desired time is displayed.
When the operation is completed, push the crown back to
position 1.
Jaeger-LeCoultre Calibre 849.
1 2
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- English
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