====== Greubel Forsey Grande Sonnerie ======

{{wst>image_cr|Greubel Forsey|Grande Sonnerie}}

**Grande Sonnerie** is a wristwatch by [[Greubel Forsey]].

With this hitherto most complicated watch developed by this manufacturer, [[Greubel Forsey]] wins the "Mechanical Exception" award at the 18th [[Grand Prix d'Horlogerie de Genève]] ([[GPHG]]).

Robert Greubel, Stephen Forsey and their team completed eleven years of research for this model, assembled no less than 935 components, filed two patents, incorporated Greubel Forsey's third basic invention (the [[Greubel_Forsey_Tourbillon_24_Secondes|Tourbillon 24 Secondes]]), developed an acoustic resonance cage generating an extreme purity of sound, installed eleven functional safety features, and carried out a three-year wear test.

<WRAP ud ud_mod>
**Movement:**
  * [[Manual winding]] [[manufacture movement]], 21,600 A/h
  * [[Tourbillon]]
  * [[Repetition]] with [[automatic]] winding
  * 935 components
  * 85 [[jewels]]
  * [[Double barrel]]
  * [[Power reserve]] 72 h

**Case:**
  * [[Titanium]]
  * Ø 43.5 mm, H 16,13 mm
  * [[Sapphire crystal]] [[domed]] and transparent caseback
  * Lateral window with shaped sapphire
  * [[Waterproof]] to 3 atm

**Dial:**
  * Multi-level in gold, black colour
  * Window showing the hammers and the gongs
  * Gold hour markers
  * Gold display sectors

**Functions:**
  * Hours, minutes, small second
  * [[Power reserve indicator]], indication of the striking power reserve

**Bracelet:**
  * Hand-sewn Alligator strap with [[folding clasp]]
</WRAP>

{{tag>Watch_models Watches_with_tourbillon Watches_with_repetition Greubel_Forsey_models}}