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--- greubel_forsey_gmt_balancier_convexe [25.09.2022 12:17] – created gerdlothar
+++ greubel_forsey_gmt_balancier_convexe [02.12.2022 20:43] (current) – external edit 127.0.0.1
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+====== Greubel Forsey GMT Balancier Convexe ======
+{{wst>image_cr|Greubel Forsey|GMT Balancier Convexe|280px}}
+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}}