Greubel Forsey GMT Balancier Convexe

Today, Greubel Forsey has unveiled the 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

This new creation preserves the iconic theatrical architecture of the original GMT Balancier Convexe, while refining its proportions and mechanical layout.

• The Convexe case, still sculpted in titanium, is now more compact at 42.90 mm at the caseband for improved wearability.

• A new 72-hour power reserve indicator is seamlessly integrated into the dial, bringing added functionality without disrupting the visual harmony.

Technical enhancements

The movement now contains 496 components, 73 more than its predecessor, attesting to a re-engineering of the calibre to accommodate new displays and improved chronometric performance. Finishing remains uncompromising: the inclined escapement is suspended beneath a flat black polished and barrel polished steel bridge, resting on polished steel pillars. The Terrestrial globe – one of the Atelier’s most emblematic elements – remains, rotating in real time within a layered amphitheatre of time indications.

On the caseback, a sapphire disc engraved with 24 cities reflects both universal time and summer/winter time, with La Chaux-de-Fonds replacing Paris – a subtle but meaningful shift.

Exclusivity

This new GMT Balancier Convexe will be made in a strictly limited series of 22 timepieces.

Technical specifications

Greubel Forsey GMT Balancier Convexe

Limited edition of 22 pieces

Case

• Material: Titanium with curved sapphire crystal
• Diameter: 42.90mm
• Bezel diameter: 44.90mm
• Height: 15.10mm
• Height on synthetic sapphire crystals: 17.60mm
• Crown: Titanium, polished, frosted and straight-grained, with GF logo
• Three-dimensional, variable geometry-shaped bezel, hand-polished with hand-finished straight graining
• Profiled lugs, screwed fixing
• Transparent back with curved and high domed synthetic sapphire crystal
• Engraved GMT pusher
• Titanium security screws
• Raised engraving “GMT” and “Greubel Forsey”
• Water-resistant to 5atm - 50m – 164ft

Dial

• 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

Hands

• Hours and minutes, red triangles with Super-LumiNova
• 2nd time zone GMT indicator, red triangle
• Small seconds in polished blued steel, flat black polished head

Movement

• Patented hand-wound movement
• Diameter: 37.80mm
• Thickness: 13.80mm
• Frequency: 3 Hz, 21’600 vibrations/hour
• Balance wheel: In-house variable-inertia with 6 gold mean-time screws (12.60mm diameter)
• Number of jewels: 72. Olived-domed jewels in gold chatons
• Number of parts: 496
• Escapement platform: 59 parts
• Barrels: Two series-coupled fast-rotating barrels (1 turn in 3.2 hours), one of which is equipped with a slipping spring to avoid excess tension
• Power reserve of 72 hours

Functions/Indications

• Hours and minutes
• Small seconds
• 2nd time zone GMT
• Rotating globe with universal time
• Day-and-night
• 24 time zones universal time
• Summer time, winter time
• 72-hours power reserve on a sector

Strap and buckle

• Hand-sewn textured rubber or rubber with text in relief
• Titanium folding clasp, engraved GF logo
• On demand: 3-row metal bracelet in titanium, folding clasp with integrated fine adjustment, engraved GF logo

MSRP: TBC

For more information, please visit greubelforsey.com