====== Jaeger-LeCoultre Duomètre à Quantième Lunaire ======
{{wst>image_cr|Jaeger-LeCoultre|Duometre a Quantieme Lunaire|Duomètre à Quantième Lunaire}}

{{wst>image_r|JLC 381|calibre JLC 381\\ © [[Jaeger-LeCoultre]]}}

**Duomètre à Quantième Lunaire** is a wristwatch by [[Jaeger-LeCoultre]].

This was the second mainstream model in the [[Jaeger-LeCoultre Duomètre]] family and was presented in [[2010]]. It is a model with [[annual calendar]] and [[moon phase indication]]. The version shown here has a dial from Grand-Feu [[enamel]].

The Dual-Wing movement is characterized by two separate power sources with a [[power reserve]] of each 50 hours each The first, which is regulated by the escapement and the balance wheel, is used exclusively for the precise measurement of passing time, while the second source of energy is devoted to the indication of the functions hours, minutes, seconds, annual calender and moon phases. Their synchronization is ensured by the hand mechanism of the [[seconde foudroyante]]. Winding the crown clockwise powers the escapement and counter-clockwise powers the display functions.

The 42 mm Quantième Lunaire was introduced in [[2010]]. A 40.5 mm version was introduced at [[SIHH]] in [[2012]]. At SIHH in [[2014]], the company introduced the limited-edition 40.5 mm [[white gold]]/enamel dial model.

<WRAP ud ud_mod>
**Reference:**
  * Q604.04.20, 42 mm [[yellow gold]], ivory dial, limited to 300 pieces (2010)
  * Q604.24.20, 42 mm [[yellow gold]], silver dial, partially skeletonized, limited to 300 pieces
  * Q604.25.20, 42 mm [[rose gold]], silver dial, partially [[skeletonized]]
  * Q604.25.22, 42 mm [[rose gold]], silver dial, partially [[skeletonized]], limited to 200 pieces
  * Q604.35.70, 42 mm [[white gold]], matte black dial, limited to 200 pieces (2011)
  * Q604.25.21, 40.5 mm [[rose gold]], white dial (2012)
  * Q604.34.20, 40.5 mm [[white gold]], silver dial
  * Q604.35.E1, 40.5 mm [[white gold]], grand feu enamel dial, limited to 200 pieces

**Movement:**
  * [[Manufacture]] [[manual winding]] movement calibre [[JLC 381]], 21600 A/h
  * 2 [[barrel]]s
  * 40 [[jewels]]
  * 50 hours [[power reserve]]
  * 367 components

**Case:**
  * ø 40.5 mm, H 13.40 mm or 42 mm, H 13.5 mm
  * Both sides [[sapphire crystal]] with [[anti-glare treatment]]
  * [[Waterproof]] to 50 m

**Dial:**
  * Grand-Feu [[enamel]]

**Functions:**
  * Hours, minutes, second and [[seconde foudroyante]]
  * [[Hacking seconds]] and [[zero reset]]
  * Date, [[moon phase]], [[power reserve]]
  * [[Power reserve]] of the regulator

**Bracelet:**
  * Bluees alligator leather strap with [[tang-type buckle]]
</WRAP>

{{tag>Watch_models Jaeger-LeCoultre_models Watches_with_moon_phase Watches_with_annual_calendar Jaeger-LeCoultre_Duomètre_models}}