The Duomètre à Chronographe is the first watch to be equipped with the Dual-Wing concept developed by Jaeger-LeCoultre.
To make a chronograph watch as accurate as a chronometer was the challenge taken up in 2007 by the watchmakers at Jaeger-LeCoultre in developing the first Duomètre. Their secret weapon was the Dual-Wing concept. The Manufacture Jaeger-LeCoultre chose to equip the first model in the Duomètre collection with the chronograph function.
The first movement to use this new construction principle was Jaeger-LeCoultre Calibre 380, boasting the major asset of displaying the time with chronometer-worthy precision. In accordance with the Dual-Wing concept, the first going train is entirely dedicated to the time function (hours, minutes, seconds), while the second going train is exclusively devoted to the chronograph function and features a 1/6thsecond jumping seconds.
Each of these two mechanisms is powered by its own barrel ensuring a 50-hour power reserve (50 hours for the time, 50 hours for the chronograph). There are no transfers of energy between the two. To simplify use and for aesthetic reasons, a single crown serves to wind both barrels: turning the crown clockwise winds the time, and turning it counter-clockwise winds the chronograph.
This Calibre 380 makes the first Duomère the very first wrist chronograph watch to operate without a coupling-clutch to handle the stop/start time measurement functions. A single push-piece ensures perfect synchronisation of all five chronograph counters.
The Jaeger-LeCoultre Duomètre à Chronographe provides an impressive sixth of a second precision. A counter positioned at 6 o’clock displays the jumping seconds, divided into six units and linked to the chronograph seconds hand. This indication eliminates the need for a chronograph coupling-clutch mechanism.
Minute read-off is facilitated by a clear, harmonious and functional graphic layout. A dedicated aperture provides a digital display of the minutes from 1 to 9.
The JLC Duomètre à Chronographe is available in Pink Gold, White Gold, Yellow Gold, and Platinum versions.
Extreme care has been lavished on the decoration of Jaeger-LeCoultre Calibre 380. Two different styles of bridges, each linked to their respective function: those relating to conventional time measurement feature taut, straight lines; while those involved in chronograph timekeeping are distinguished by curving arabesque shapes.
Technical details
Model: Jaeger-LeCoultre Duomètre à Chronographe
Versions
Ref. 6012420: Pink Gold
Ref. 6016490: Platinum
Ref. 6013470: White Gold
Ref. 6011420: Yellow Gold
Movement
Jaeger-LeCoultre Calibre 380
Hand-winding movement
Number of components: 390
Vibrations per hour: 21,600 vph
Power-reserve: 50 Hours
Jewels: 49
Barrel: 2
Height: 6.95 mm
Functions
Hour – Minute
Twin Power-Reserve
Seconds
Chronograph
– Hour counter
– 30-minute counter
– 60-second counter
Minute-unit indicator
Jumping seconds
Case
18 carat gold or platinum
Water resistance: 5 bar
Dial
Silvered
Hands: Feuille
Strap
Alligator Leather
Double folding buckle, 20.0 mm
