Technical Specifications; Movement; Functions And Displays - Jaeger-leCoultre MASTER GRANDE TRADITION Manual

the criteria of the "1000 Hours Control" programme considerably exceed the
standards of official timing tests, which deal only with part of the movement.
Jaeger-leCoultre tests not only the movement prior to its being cased up in the
watch, but also the watch as a whole.

technical specifications

- self-winding mechanical movement, Calibre Jaeger-leCoultre 985.
- 28,800 vibrations/hour.
- Power reserve: approximately 48 hours.

Movement

Calibre Jaeger-leCoultre 985.

Functions and displays

the watch offers the following functions:
- Hours
- Minutes
- date
- day
- Month
- year
- Moon phases
- Flying tourbillon with seconds (hand on the tourbillon mechanism)
- Perpetual calendar
the tourbillon is a mechanical device with a carriage containing the watch's
regulating system. it performs one complete revolution per minute. it is designed
to improve the accuracy of mechanical watches by offsetting disturbances of the
balance wheel isochronism due to gravity. this watch has a flying tourbillon with a
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