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.

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• 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 barrels
• 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

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