Jaeger-LeCoultre Duometre a Quantieme Lunaire Watch
Jaeger-LeCoultre Duometre a Quantieme Lunaire Watch
The Duometre a Quantieme Lunaire embodies the latest in horological achievements of Jaeger-LeCoultre: it displays time with a jumping seconds hand showing 1/6th of a second increments and additionally providing the date and the age of the moon in a separate sub dial. The true genius of this watch however lies within the Dual-Wing movement concept, which features two independent power supplies: one entirely dedicated to creating a perfect timing foundation - regulated by escapement and balance -, the other solely for the display of time - hour, minute and seconds hands - as well as date and the age of the moon for the Northern as well as the Southern hemisphere. Both are synchronized through the jumping seconds hand mechanism driven by the escapement.
With the Duometre line, Jaeger-LeCoultre Watch breaks new ground in terms of the accuracy of mechanical wristwatches, for it devised a completely new movement structure in order to gain the highest possible precision. Therefore the watchmakers have come up with the so called Dual-Wing concept to bypass a common problem in mechanical watches: any additional complication reduces the power of the winding barrel thus depriving the precisely tuned regulation organ of a steady flow of energy from the winding barrel. The regularity of the winding barrel's energy to the going train and escapement remains of primary importance in order to measure time with the precision demanded for today's mechanical wristwatches.
Hence the influence of any given complication to the long-term rate of a watch can lead to deviations in time measurement hardly acceptable in such a valuable timepiece. This fact can be overcome by using a fully independent power source to run the complication, separating its power supply from that of the basic movement, which in turn is fed by its own winding barrel thus ensuring a constant flow of energy. Therefore the dual-wing concept, first introduced in the Duometre a Chronographe in 2007, is now incorporated in the new Duometre a Quantieme Lunaire leading to a tremendous increase of accuracy in complication movements.
Their utmost attention to such details proves that the specialists at Jaeger-LeCoultre have developed a dual-wing calendar-watch of exceptional characteristics, with levels of accuracy that until now could only have been reached by watches without complications. Such a sophisticated approach to timekeeping precision is a typical advantage that 177 years of expertise in high horology can bring.
The new Jaeger-LeCoultre Calibre 381 is executed and decorated with distinguishing decors for the corresponding parts of each function of the movement. These fine details can be appreciated through the sapphire case back of the wristwatch, visually in accordance with the typical Duometre-design: classical and understated with a touch of extravagance. Even though the watchcase houses a complex movement, its open worked dial provides clarity and ensures easy reading by being divided into two sections according to their functions: Hour and minute on the right hand side, date and moon phase on the left hand side, a central seconds hand and the jumping seconds in the lower middle of the watch.
Jaeger-LeCoultre Duometre a Quantieme Lunaire will be produced in a limited edition of 300 yellow gold watches and in an unlimited pink gold version.
Jaeger-LeCoultre Duometre a Quantieme Lunaire Technical specifications
Movement Mechanical manually-wound Jaeger-LeCoultre Calibre 381, crafted, assembled and decorated by hand
Frequency 21,600 vibrations per hour
Power-reserve 50-hours
Parts 369
Jewels 40
Thickness 7.25mm
Diameter 33.7mm
Specificities Two independant barrels
Functions
- Hours, minutes, seconds, jumping-second
- Date
- Moon-phase (North and South)
- Age of the moon
- Power reserve
- Movement power reserve
Dial
- Eggshell for yellow gold model
- Hand-grained, silver-coloured for pink gold model
Hands
- Hour and minute: leaf-type, brass, gold-plated
- Seconds: baton with pear-shaped counterweight, gold-plated
Crown
- 1 crown to start the watch, to wind the watch functions power reserve, to wind the movement power reserve and to adjust the hours and minutes
- 1 push piece to set the date
- 1 corrector to set the moon phase
Case
- 18-carat pink gold or 18-carat yellow gold
- Welded lugs
- Polished and satin-brushed finishing
- Cambered sapphire crystals, hardness N 9, glareproofed on front and back
Thickness 13.5 mm
Diameter 42 mm
Water resistance 5 atm
Straps Matt black or matt chocolate-brown alligator leather with folding clasp in 18-carat gold
References
- Q6042420, 18-carat pink gold
- Q6040420, 18-carat yellow gold, limited series of 300
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