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Greubel Forsey unveils its new GMT Balancier Convexe. As the Earth takes centre stage within a newly reimagined amphitheatre, the hours, minutes, seconds, second time zone, and universal time indications become both companions and spectators to its quiet revolution.
The new GMT Balancier Convexe replaces its predecessor entirely – not as a variation, but as a complete reinterpretation. With a redesigned case, an integrated power reserve, and enhanced ergonomics, it becomes the purest expression of our GMT complication to date – and the only GMT model in our current collection.
A refined evolution
– Titanium Convexe case now more compact at 42.90 mm for improved wearability.
– New 72-hour power reserve indicator seamlessly integrated into the dial.
Technical enhancements
– 496 components, 73 more than its predecessor.
– Inclined escapement suspended beneath polished steel bridge.
– Real-time rotating globe in layered amphitheatre.
– Sapphire disc on caseback with 24 cities, La Chaux-de-Fonds replaces Paris.
Exclusivity
– Limited to 22 pieces worldwide.
| Functions | Hours, minutes, small seconds, second time zone (GMT), rotating terrestrial globe with universal time, day/night indicator, engraved sapphire disc with cities of 24 time zones, summer/winter time, 72-hour power reserve indicator, 30° inclined balance wheel system |
|---|---|
| Movement Dimensions | Overall diameter: 37.80mm Thickness: 13.80mm |
| Number of Parts | Movement: 496 parts Escapement platform: 59 parts |
| Number of Jewels | 72 Olived-domed jewels in gold chatons |
| Power Reserve | 72 hours |
| Barrels | Two series-coupled fast-rotating barrels (1 turn in 3.2 hours), one with slipping spring |
| Balance Wheel | In-house variable-inertia with 6 gold mean-time screws (12.60mm diameter) |
| Frequency | 21,600 vibrations/hour |
| Case Dimensions | Caseband diameter: 42.90mm Bezel diameter: 44.90mm Case height: 15.10mm Height on sapphire crystals: 17.60mm |
| Water Resistance | 5 ATM / 50m / 164ft (NIHS 92-20 / ISO 22810:2010) |
| Strap Options | Hand-sewn textured rubber or rubber with text in relief Optional: 3-row titanium bracelet with folding clasp |
