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CONCEPT
A BREAKTHROUGH IN PRECISION
Before the creation of the Duometre, adding complications to a watch movement seemed irreconcilable with accurate timekeeping. That is because a complication must draw on the power supply, which interrupts the steady flow and thus jeopardises precision.
THE PHENOMENAL DUOMETRE CONCEPT
Introduced in 2007, the patented Duometre mechanism features two barrels and two separate gear trains linked to a single regulating organ. One gear train powers the time indications and the other drives all additional functions, thus ensuring a high degree of operating accuracy.
CALIBRE
CALIBRE 388: PRECISION AT HEART
Jaeger-LeCoultre distinguishes itself with the development of increasingly sophisticated means of achieving the perfect regularity of the ‘heartbeat’ of its calibres. Beating at a frequency of 4Hz to further enhance chronometry, Calibre 388 ensures highly accurate timekeeping.
MOVEMENT
In-House Calibre
388
Movement
Manual winding
Thickness
11.15mm
The balance makes a to-and-fro movement at a given frequency (two vibrations). It is measured either in Vibration per Hour (VPH) or Hertz (Hz).
28800
The balance makes a to-and-fro movement at a given frequency (two vibrations). It is measured either in Vibration per Hour (VPH) or Hertz (Hz).
4
The time the watch will continue to function before rewinding is necessary.
46 hours
Functions
Moon phase, Héliotourbillon, Seconds, Month, Date, Day, Day/Night indicator, Perpetual calendar, Hour - Minute, Twin Power-Reserve, Year
Components
655
Jewels are used as bearings for pivots to reduce friction in a watch movement.
89
DIAMETER
34.3 mm