Jaeger-leCoultre 978 Bedienungsanleitung Seite 31

TECHNICAL
SPECIFICATIONS
- Automatic mechanical
Manufacture movement,
Jaeger-LeCoultre Caliber 978.
- 28,800 vibrations/hour.
- Power reserve: approximately 45 hours.
FUNCTIONS
A tourbillon is a mechanical device con-
sisting of a carriage containing the watch's
regulating system and performing one
complete revolution per minute. It is de-
signed to improve the accuracy of me-
chanical watches by offsetting disruption
of the balance wheel isochronism by the
earth's gravity.
The model combines the tourbillon mech-
anism with the two time zones. This allows
you to set a different time on the main
display without losing track of the pre-
cise minute and second setting, all while
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