====== Greubel Forsey GMT Balancier Convexe ======

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The **GMT Balancier Convexe** is a wristwatch by [[Greubel Forsey]].

This model was presented in August [[2022]]. It features a 30° inclined balance wheel system, GMT function, 2nd time zone, rotating globe with universal time and day-and-night, universal time on 24 time zones, summer and winter time and cities observing summer time. 

It is the first GMT caliber with the characteristic inclined balance. The dominant positioning of the globe on the dial is striking. The convex case nestles comfortably on the wearer's wrist.

Like the Earth itself, the globe display completes one full rotation in 24 hours. This display is framed by three rings which indicate two complementary times: hours and minutes local time, as well as universal time.

The 24 time zones displaying universal time are set against a black background if the time indicated is at night, and on a white background during the day time.

Local time is indicated on the two outer rings: one for the hours on a grey satin-finished ring, and minutes on a thin black outer ring. Each time indication has its own hand with a red triangular tip filled with luminescent material. These hands move on two further rings to display GMT. Finally, an off-centre display at 10 o’clock indicates a second time zone with a blue gold hand.

On the case back a disc shows the 24 time zones indicating the UTC time of the 24 reference cities.

<WRAP ud ud_mod>
**Reference:**
  * GMT Balancier Convexe Titanium

**Movement:**
  * [[Manual winding]] [[manufacture movement]], 21,600 A/h
  * [[Balance spring]] with [[Phillips terminal curve]], inclined at a 30° angle
  * Two coaxial series-coupled fast-rotating [[barrel]]s
  * 42 [[jewels]]
  * Olived-domed jewels in gold [[chatons]]
  * 423 parts
  * [[Power reserve]] 72 h

**Case:**
  * [[Titanium]]
  * Three-dimensional, variable geometry-shaped bezel, hand-polished with hand-finished straight graining
  * Ø 46.5 mm, H 13.75 mm
  * [[Sapphire crystal]] curved
  * Caseback with transparent curved and high domed sapphire crystal
  * [[Waterproof]] to 10 atm

**Dial:**
  * Openworked
  *//Dial side://
    * Terrestrial globe in titanium, relief-engraved continents, ocean blue treatment
    * Day-and-night UTC indicator in titanium, engraved and lacquered
    * GMT indicator in gold
    * Amphitheatre hour-ring with engraved and lacquered minute-circle
    * Small seconds indicator in gold
  * //Movement side://
    * Synthetic sapphire disc displaying city names surrounded by 2 rings (UTC and summer time) engraved and lacquered, hand matt lapped
    * Gold “summer time” plate with limitation number, raised engraving, hand matt lapped

**Functions:**
  * Hours, minutes, [[small seconds]]
  * [[Second time zone]] [[GMT]]
  * Rotating globe with universal time
  * [[Day/Night]]
  * 24 time zones universal time
  * Summer time, winter time

**Bracelet:**
  * Rubber strap with [[folding clasp]]
  * On demand: 3-row metal bracelet in titanium

**Limitation:**
  * 22 per year between 2022 and 2024
</WRAP>


{{tag>Watch_models Dual_timezone_watches GMT_watches Worldtimer_watches Greubel_Forsey_models}}