====== Jaeger-LeCoultre Duomètre à Sphérotourbillon ======
{{wst>image_cr|Jaeger-LeCoultre|Duometre a Spherotourbillon|Jaeger-LeCoultre Duomètre à Sphérotourbillon}}

{{wst>image_cr|Jaeger-LeCoultre|Duometre a Spherotourbillon RS|Jaeger-LeCoultre Duomètre à Sphérotourbillon, back}}

{{wst>image_r|JLC 382|Calibre JLC 382\\ © [[Jaeger-LeCoultre]]}}

The **Duomètre à Sphérotourbillon** (also called [[Jaeger-LeCoultre Hybris Mechanica|Hybris Mechanica 9]]) is a [[tourbillon]] watch from [[Jaeger-LeCoultre]].

Introduced in [[2012]], the Duomètre à Sphérotourbillon was the fourth model in the [[Jaeger-LeCoultre Duomètre]] line. Each member of this family is significantly different, but each divides [[two barrel]]s of power between independent functions of the watch movement. In the case of the Duomètre à Sphérotourbillon, one mainspring barrel powers the [[gear train]] and complications while the other powers the [[tourbillon]] [[escapement]].

The Sphérotourbillon is a multi-axis [[tourbillon]] with numerous important technical achievements. In addition to the divided "Duomètre" [[double barrel]] power system, the Duomètre à Sphérotourbillon uses an unusual cylindrical [[balance spring]] and is the first tourbillon to include a stop seconds and zero reset feature for precise time adjustment.

The [[tourbillon]] rotates on two axes Every 30 seconds around the axis of the balance and every 15 seconds around a second axis, inclined 20º.

Cylindrical balance springs have been seen in marine chronometer clocks before but it was not until the [[Jaeger-LeCoultre Reverso Gyrotourbillon 2]] in [[2008]] that such a spring appeared in a wristwatch. This same concept is used in the Duomètre à Sphérotourbillon, with two terminal Breguet curves, one at each end of the spring.

Although the escapement does not stop as is common with [[hacking]] movements, a push-piece at 2 o'clock serves to stop the small seconds hand and bring it back to zero, according to the [[flyback]] principle. This had never before been achieved in a tourbillon. By allowing the escapement to continue its motion even as the gear train is stopped, the watch will not suffer from timekeeping fluctuations when the movement restarts.

The Duomètre à Sphérotourbillon was released in a limited edition of 75 pieces in platinum and a standard edition in pink gold.


<WRAP ud ud_mod>

**Reference:**
  * 605.25.20 - 42 mm [[pink gold]], crystalized grained dial "Duomètre Sphérotourbillon"
  * 605.65.90 - 42 mm [[platinum]], silver dial "Duomètre Sphérotourbillon Boutique Edition"
  * 605.34.06 - 42 mm [[white gold]], blue aventurine dial "Duomètre Sphérotourbillon Bleu"

**Movement:**
  * [[Manufacture]]-[[manual winding]] movement caliber [[JLC 382]], 21,600 A/h
  * Sphérotourbillon with complete revolution in 30 seconds
  * 2 combined movements 
  * Carriage axis rotation speed 15 seconds for a complete revolution
  * Carriage rotation speed 30 seconds for a complete revolution
  * Cylindrical [[balance-spring]]
  * [[Nickel silver]] bridges and [[mainplate]]
  * 2 [[barrel]]s
  * 55 [[jewels]]
  * 50 hours [[power reserve]]
  * 460 components

**Case:**
  * [[Rose gold]]
  * 42 mm, H 14,1
  * [[Sapphire crystal]] on both sides
  * [[Waterproof]] to 50 m

**Dial:**
  * Crystalline grained
  * Appliques in rose gold

**Functions:**
  * Hour (travel time-zone), minute and small second with [[flyback]]
  * [[Power reserve]]s (indications and movement)
  * [[Annual calendar]] with hands
  * 24-hour reference time-zone
  * Sphérotourbillon

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

{{tag>Watch_models Watches_with_tourbillon Watches_with_annual_calendar Jaeger-LeCoultre_models Jaeger-LeCoultre_Hybris_Mechanica_models Jaeger-LeCoultre_Duomètre_models}}