The «1000 Hours Control» test
by Jaeger-LeCoultre
Jaeger-LeCoultre subjects each of its watches to the rigour-
ous “1000 Hours Control” test programme. Unique in its kind,
this programme consists of 1000 hours of comprehensive,
stringent checks. The “1000 Hours Control” seal or mark-
ing affixed or engraved on the back of your watch certi-
fies that it has undergone this observation programme in
our laboratories and has passed all the tests, relating to rate
regularity, temperature 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.
Technical specifications
- Mechanical manually-wound movement, Calibre 976.
- 28,800 vibrations/hour.
- Power-reserve: approximately 48 hours.
Movement
Use
The crown of the Grande Reverso 976 watch enables you to:
- Wind up the watch if it has not been worn for more than
48 hours (crown in position 1).
- Quick-set the hour hand in one-hour jumps, for example
if changing time-zone (crown in position 2).
- Set the minute and hour (crown in position 3).
Winding
Crown in position 1.
The watch is wound by turning the crown clockwise. The
movement is fully wound when the crown is locked.
Do not attempt to wind a manually-wound watch beyond the
lock-point. To ensure good rate accuracy, it is preferable to
wind your watch regularly, once a day.
Setting the hour hand in one-hour jumps
This position enables you to quick-set the hour in one-hour
jumps, without modifying the minute setting.
Pull the crown out to position 2. Move the hour hand for-
wards or backwards to the desired hour.
Setting the hour and minute
Pull the crown out to position 3.
Move the hands forwards or backwards until the desired time
is displayed. The movement will be locked (“stop seconds”
function). To ensure an accurate setting, stop the seconds hand
at 12 o’clock. When the operation has been completed, push
the crown back into position 1. The movement will restart.
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Jaeger-LeCoultre Calibre 976.
G
rande
r
everso
976
- English
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