Greubel Forsey unveiled the new GMT Balancier Convexe that features a caliber with inclined balance wheel and the Earth at its centre. The titanium sphere with its continents, seas and oceans, is one of the Atelier’s most emblematic creations. The Earth moves in a constant 24-hour rotation, just as our planet rotates in real life. It is bordered by three rings which indicate 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 shown is at night, and on a white background during the day time.
Local time is showcased 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 features its own hand with a red triangular tip filled with luminescent material. These hands move on two further rings to display GMT. An off-centre display at 10 o’clock shows a second time zone with a blue gold hand.
The caseback features the disc with 24 time zones indicating the UTC time of the 24 reference cities, but with a rather appropriate modification: the UTC of Paris has been replaced by La Chaux-de-Fonds, Switzerland.
The 30° inclined balance wheel is held by a flat black polished and barrel polished steel balance wheel bridge on polished steel pillars. To its right, the small seconds, displayed with a blue gold hand completes the ensemble. The titanium bridges are hand-finished with a steel brush. The frosted surfaces catch the light and accentuate the globe.
The titanium case with a diameter of 46.5mm around the bezel and 43.5mm around the caseband, hugs the curve of the wrist.
Greubel Forsey will only produce 66 GMT Balancier Convexe timepieces: 22 per year between 2022 and 2024.
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