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Greubel Forsey Redefines Haute Horlogerie with the New GMT Balancier Convexe

JUNE 05 2025    |    Novelties

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.

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Greubel Forsey GMT Balancier Convexe

Greubel Forsey GMT Balancier Convexe

Technical Specifications

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

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Chronoswiss Reimagines a Modern Classic with the New Lunar Chronograph Aurora

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At the heart of the transformation is its fully CVD‑coated dial, which shifts fluidly from deep green to vivid blue as light moves across its surface. Inspired by the ethereal glow of the aurora borealis, this chromatic effect gives the watch a quietly dramatic presence, making every glance feel like a changing atmospheric phenomenon. Balanced chronograph counters, a central analog date, and a poetic moon phase at 3 o’clock come together to form a composition that remains faithful to the model’s architectural heritage while embracing a distinctly modern personality.

The polished stainless‑steel case retains iconic design elements that have defined Chronoswiss for decades, including the onion crown and screwed lugs—details that reinforce the watch’s lineage and mechanical authenticity. Paired with a contemporary grey nubuck leather strap, the Lunar Chronograph Aurora combines classical provenance with renewed visual energy, offering collectors a sophisticated yet forward‑looking chronograph that bridges past and present with effortless elegance.

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