Jaeger-LeCoultre Duometre Quantieme Lunaire
About This Watch
The Jaeger-LeCoultre Duometre Quantieme Lunaire applies the revolutionary Dual-Wing concept to a moon phase calendar complication, creating a watch of extraordinary technical sophistication. Like its chronograph sibling, the caliber 381 features two independent mechanisms: one wing drives the time display with its distinctive jumping seconds, while the other powers the calendar functions including a moon phase accurate to one day in 122 years. The separation of functions means the calendar indications are powered independently of the timekeeping, a unique approach in watchmaking. The 42mm white gold case frames a beautifully proportioned silver dial where the two power reserve indicators — one for each wing — flank the dial at three and nine o'clock. The moon phase display is rendered with meticulous detail, showing both a realistic lunar surface and a starfield background. The date is displayed via a retrograde hand in a sector at six o'clock. The 47-jewel movement is finished to the highest standards of the JLC Manufacture, with every component hand-decorated. The Duometre collection sits at the apex of JLC's regular production, just below the Hybris Mechanica pieces, and demonstrates why the brand is known as the watchmaker's watchmaker. This is a watch that earns respect from the most discerning collectors and horologists.
In-Depth Review
# Duometre Quantieme Lunaire Editorial
The Jaeger-LeCoultre Duometre collection represents a rare breed of contemporary haute horlogerie, where technical ambition meets restrained elegance. The Quantieme Lunaire exemplifies this philosophy through its dual-wheel escapement architecture, a hallmark of the Duometre line that allows independent regulation of timekeeping and complications. Beneath its refined 42mm white gold case lies the hand-wound Caliber 381, a movement of considerable sophistication boasting 47 jewels and a 50-hour power reserve. The complication suite is curated rather than excessive—a moonphase display, jumping seconds, date indicator, and dual power reserve indicators are integrated without cluttering the silver dial. This restraint distinguishes Jaeger-LeCoultre's approach from competitors who often prioritize visual complexity over mechanical coherence.
The ideal owner of the Duometre Quantieme Lunaire is a collector of developed taste, someone who values technical credibility and Swiss watchmaking heritage over brand cachet alone. This watch suits the executive or connoisseur who wears dress watches regularly, appreciates the interaction between complications and daily use, and understands that a 50-hour power reserve is a practical asset rather than a marketing point. The 50-meter water resistance and alligator strap positioning confirm its formal orientation.
In the sub-$30,000 secondary market segment, the Quantieme Lunaire competes with offerings like the IWC Portugieser Perpetual Calendar and Omega Aqua Terra Moonphase. Unlike these alternatives, Jaeger-LeCoultre's dual-escapement architecture delivers genuine mechanical differentiation, justifying its presence among watchmaking's technical elite.
Specifications
Movement
| Movement Type | Manual |
|---|---|
| Caliber | Jaeger-LeCoultre 381 |
| Power Reserve | 50 hours |
| Frequency | 21,600 vph |
| Jewels | 47 |
Case
| Case Diameter | 42.0mm |
|---|---|
| Case Thickness | 14.3mm |
| Case Material | 18K White Gold |
| Crystal | Sapphire with anti-reflective coating (front and back) |
| Bezel | Fixed, polished |
| Dial Color | Silver |
| Lug Width | 22mm |
| Lug-to-Lug | 49.0mm |
Features
| Water Resistance | 50m / 164ft |
|---|---|
| Bracelet/Strap | Black alligator leather strap |
| Clasp | Deployant clasp in 18K White Gold |
| Weight | 128g |
| Complications |