Jaeger-LeCoultre Duomètre à Quantième Lunaire 40.5

Jaeger-LeCoultre has launched a smaller version (40.5 mm) of its Duomètre à Quantième Lunaire watch.

Introduced in 2010, Jaeger-LeCoultre Duomètre à Quantième Lunaire is the second creation from the highly technical Dual-Wing concept.

The new 40.5mm diameter version (reference Q6042521) comes in a pink gold case with a silver-colored, crystalline grained dial. Its precursor has a 42mm case.

Jaeger-LeCoultre Duomètre à Quantième Lunaire 40.5

The elegant and easily readable dial displays the hours, minutes, seconds and moon-phase. Inside the JLC Duomètre à Quantième Lunaire 40.5 model beats Calibre 381, based on the Dual-Wing concept.

This manual-winding Jaeger-LeCoultre Dual-Wing movement incorporates 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.

The JLC Duomètre à Quantième Lunaire watch offers a stunning precision with a jumping seconds hand moving in sixth of a second increments while displaying the date and the moon phase on a separate subdial.

Technical details

Model: Jaeger-LeCoultre Duomètre à Quantième Lunaire 40.5
Reference Q6042521, in 18-carat pink gold

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

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

Crystalline grained
Pink gold appliques

Hours and minutes : “leaf” type
Seconds : baton type with pear-shaped counterweight

Operating elements
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

ø 40.5 mm, thickness : 13.07 mm
18-carat pink gold
Polished and satin-brushed finish
Sapphire crystal, cambered on the dial side, hardness no. 9, glare-proofed on front and back
Water resistance : 5 bar

Chocolate-toned alligator leather with 18-carat gold pin buckle

Approximate retail price
$ 36,300

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