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- Geneva
- 00:29
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Pre-SIHH 2012
Duomètre à Quantième Lunaire 40.5
A calendar watch that was as accurate as a chronometer
The Watch Quote™ - January 16th, 2012
Day, date month... Gear wheels, adjustments, energy... Because running such an elaborate complication as a calendar within a classic watch naturally has a detrimental effect on the precision of the time indications, the watchmakers at Jaeger-LeCoultre knew they had found in the Dual-Wing concept an instrument capable of creating a perfect alchemy: a calendar watch that was as accurate as a chronometer.
Arranged on the elegant and easily readable dial, the hours, minutes, seconds and moon-phase displays appear to make the Duomètre à Quantième Lunaire a classic watch model. But inside the case and partially hidden from view beats Calibre 381, a prodigious movement boasting unprecedented precision based on the Dual-Wing concept and which propels the watch firmly into the spheres of Haute Horlogerie.
The truly extraordinary appearance of the watch lies in the actual concept behind the Dual- Wing movement, which is distinguished by the presence of two independent energy sources: the first, regulated by the escapement and the balance, is entirely dedicated to the precise measurement of the passing of time; whereas the second source of energy is devoted to the display of the functions: hours, minutes, seconds, calendar and moon phases for both hemispheres. Their synchronisation is ensured by the jumping seconds hand mechanism.
This Duomètre à Quantième Lunaire brilliantly illustrates the extreme research undertaken in the laboratory-workshops of Jaeger-LeCoultre: this watch reaches the heights of precision with a jumping seconds hand moving in sixth of a second increments while displaying the date and the moon phase on a separate sundial.
Through in-depth study and a willingness to challenge the fundamental principles of horological theory, the Jaeger-LeCoultre specialists have succeeded in creating a calendar watch in accordance with the Dual-Wing concept – a principle featuring exceptional characteristics that enable a degree of rating precision that was previously the exclusive preserve of timepieces free of any complications.
Only the expertise accumulated over 178 years could thus enable Jaeger-LeCoultre to begin writing a new chapter in the history of Fine Watchmaking...
Jaeger-LeCoultre Duomètre à Quantième Lunaire 40.5
Technical specifications
| Movement | : | Duomètre à Quantième Lunaire 40.5 Technical specifications Mechanical manually-wound Jaeger-LeCoultre Calibre 381, crafted, assembled and decorated by hand 21,600 vibrations per hour 50-hour power reserve 367 parts 40 jewels 7.25 mm thick 33.70 mm in diameter Two independent barrels |
| Functions | : | Hours, minutes, seconds, and jumping stop seconds with zero/reset system, date, age and phase of the moon (for both hemispheres), power reserve Regulator power reserve |
| Dial | : | Crystalline grained Pink gold appliques |
| Hands | ||
| Hours and minutes | : | “leaf” type |
| Seconds | : | baton type with pear-shaped counterweight |
| Crowns | : | One crown to wind the watch and adjust the hours and minutes • One push-piece to adjust the date One corrector to adjust the moon phase |
| Case | : | ø 40.5 mm, |
| Thickness | : | 13.07 mm |
| Material | : | 18-carat pink gold Polished and satin-brushed finish |
| Crystal | : | sapphire crystal, cambered on the dial side, hardness no. 9, glareproofed on front and back |
| Water resistance | : | 5 bar |
| Strap | : | in chocolate-toned alligator leather with 18-carat gold pin buckle |
| Reference | : | Q6042521, 18-carat pink gold |
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