GREUBEL FORSEY – Balancier Convexe S² Ceramic Edition

GREUBEL FORSEY – CONVEXE Balancier Convexe S²  GF09XV Black and White Ceramic 41.5 mm Edition 2026

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 BALANCIER CONVEXE S² | GF09XV THE CLOSING CHAPTER

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Greubel Forsey unveils the final two editions of the Balancier Convexe S² – one in black ceramic and 5N red gold, the other in white ceramic – marking the conclusion of a calibre developed and built over the past five years. Each edition is limited to only 11 timepieces, making them the most exclusive executions of the series. 

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Housed in the signature Convexe case measuring 41.5mm across the caseband and built around the hand-wound 30° inclined balance wheel sys- tem, these editions represent the definitive ex- pression of the Balancier Convexe S² movement. With their release, the calibre enters its final phase: production will cease permanently in 2026, closing this chapter of Greubel Forsey’s mechanical development.

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From its origin, the Balancier Convexe S² was de-signed as a fully integrated object in which case geometry and movement structure evolve together. 

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The Convexe architecture follows the natural curvature of the wrist, allowing the three-dimensional movement to remain balanced, legible and comfortable in daily wear. 

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Rather than enclosing the calibre, the case extends its architecture outward, reinforcing the dialogue between exterior form and mechanical construction. 

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At the heart of the movement lies Greubel Forsey’s 30° inclined balance wheel system, positioned as the visual and chronometric centre of the composition. 

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The movement is built around openness and perspective, with multi-level bridges and suspended structures designed to reveal rather than conceal mechanical function. 

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Composed of 301 components, with an escapement platform of 68 parts, the calibre combines structural lightness with technical density. Two fast-rotating coaxial barrels provide a 72-hour chronometric power reserve, while the in-house variable-inertia balance with six gold mean-time screws operates at 21’600 vibrations per hour.  The finishing philosophy remains fundamental to the identity of the timepiece. 

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 Titanium bridges and main plates are frosted and hand-finished with polished bevels, countersinks and carefully executed transitions between surfaces. 

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Every component is treated with the same level of attention, including areas that remain largely unseen, reflecting a consistent approach to execution where integrity of construction prevails over visibility. 

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The two final editions express contrasting visual identities while sharing the same mechanical foundation. 

The black ceramic and 5N red gold edition emphasises contrast and depth. 

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Black-treated movement components and the ceramic case frame the architecture, while the red gold bezel and caseback introduce warmth and visual weight. 

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The interplay between matte and polished surfaces amplifies the three-dimensional character of the movement and reinforces the sculptural nature of the Convexe case. 

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The white ceramic edition explores the opposite approach. The monochromatic light-toned case accentuates openness and precision, allowing the movement to emerge through light and shad-ow. 

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The result is a more technical and graphic expression, where structure becomes the primary visual language. The white ceramic construction highlights the purity of the Convexe geometry while preserving the same mechanical depth and legibility.

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Both editions retain the essential functional layout of the Balancier Convexe S²: hours and minutes displayed on a suspended arch bridge, small seconds, and a sector power-reserve indication. 

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The curved sapphire crystals, three-dimensional bezel geometry and profiled lugs reinforce the continuity between movement architecture and exterior form, maintaining the balance between presence and we arability that defines the Convexe approach. 

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These two editions complete a five-year exploration of the Balancier Convexe S² calibre through different material and aesthetic interpretations.

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Their release marks not an evolution, but a conclusion. In 2026, production of the movement will end permanently. The year 2026 also marks the beginning of a gradual transition toward an almost entirely new collection. 

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As Greubel Forsey closes the chapter on calibres that have shaped the past years of technical and creative development, each will be retired deliberately – not silently – with a final expression that celebrates its contribution to the Atelier’s continuous evolution. 

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Limited to only 11 timepieces per edition, the black ceramic / 5N red gold and white ceramic executions stand as the final and most exclusive expressions of the Balancier Convexe S² – the closing statement of a calibre defined by architecture, chronometric intent and mechanical coherence. 

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TECHNICAL SPECIFICATIONS  

Collection   CONVEXE

Name   Balancier Convexe S² White Ceramic Edition

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Balancier Convexe S2
In white ceramic Limited edition
Hand-wound movement 
• Patented
Hours and minutes • small seconds • power-reserve
• 30° inclined Greubel Forsey balance wheel system

Ref. GF09xv

MOVEMENT
MOVEMENT DIMENSIONS
• Overall diameter: 37.00mm
• Thickness: 10.05mm
NUMBER OF PARTS
• Movement: 301 parts
• Escapement platform: 68 parts
NUMBER OF JEWELS • 43
• Olived-domed jewels in gold chatons
CHRONOMETRIC POWER RESERVE • 72 hours
BARRELS
• Two coaxial series-coupled fast-rotating barrels (1 turn in 3.2 hours),
one of which is equipped with a slipping spring to avoid excess tension
• Relief-engraved text, circular-grained
BALANCE WHEEL
• In-house variable-inertia with 6 gold mean-time screws (12.60mm diameter)
FREQUENCY • 21’600 vibrations/hour
BALANCE SPRING
• Phillips terminal curve
• Geneva-style stud
BRIDGES AND MAIN PLATES
• Titanium
• Frosted, polished bevelling and countersinks
• Multi-level, openworked suspended-arch bridge, straight-grained
and polished, polished bevelling and countersinks
MOVEMENT SIDE
• Frosted bridges, polished edges and bevelling
• Gold plate with engraved limitation number, circular-grained,
polished bevelling and countersinks, straight-grained flanks
ESCAPEMENT PLATFORM
• Titanium
• Inclined at a 30° angle
• Frosted, polished countersinks, large straight-grained inclined facet
• Multi-level, openworked balance wheel bridge, straight-grained and polished, polished bevelling and countersinks GEARING
• Involute circle profile
• Inclined gear and profiled teeth on intermediate wheels of the set hands mechanism and small seconds
DISPLAYS
• Hours and minutes, on suspended arch bridge
• Small seconds
• Power reserve on a sector

EXTERIOR

CASE
• In white ceramic with curved synthetic sapphire crystal
• Three-dimensional, variable geometry-shaped bezel, hand-finished
• Ceramic profiled lugs, screwed fixing
• Transparent back with high domed synthetic sapphire crystal
• Titanium security screws
• Raised engraving “Balancier Incliné” and “Greubel Forsey”
CASE DIMENSIONS
• Caseband diameter: 41.50mm
• Bezel diameter: 44.00mm
• Case height: 12.85mm
• Height on synthetic sapphire crystals: 14.80mm
WATER RESISTANCE OF THE CASE • Water-resistant 3atm - 30m – 100ft
(standard NIHS 92-20/SN ISO 22810:2010)
CROWN
• Titanium and rubber with GF logo
• Colour-coded rubber capping, interchangeable
DIAL SIDE
• Three-dimensional, variable geometry hour-ring, polished, with engraved and lacquered minute-circle
• Three-dimensional, variable geometry hour indexes, polished, with Super-Luminova
• Power-reserve indicator, lacquered
• Gold small seconds dial, with polished bevel, engraved and lacquered
HANDS
• Hours and minutes, curved profile, polished steel with Super-Luminova
• Small seconds, in polished steel, flat black polished head
• Power-reserve, red triangle
STRAP AND CLASP
• Hand-sewn textured rubber or rubber with text in relief
• Titanium folding clasp, engraved GF logo

• 🔰Limitation 
• Limited Edition of 11 pieces.

🔴 Price  On request💰

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TECHNICAL SPECIFICATIONS  

Collection  CONVEXE 

Name   Balancier Convexe S² Black Ceramic and 5N Red Gold Edition

 Click , to see the large size. ▶ BIG FOTO 

Balancier Convexe S2
In ceramic and 5N red gold Limited edition
Hand-wound movement 
• Patented
Hours and minutes • small seconds • power-reserve
• 30° inclined Greubel Forsey balance wheel system

MOVEMENT
MOVEMENT DIMENSIONS
• Overall diameter: 37.00mm
• Thickness: 10.05mm
NUMBER OF PARTS
• Movement: 301 parts
• Escapement platform: 68 parts
NUMBER OF JEWELS • 43
• Olived-domed jewels in gold chatons
CHRONOMETRIC POWER RESERVE • 72 hours
BARRELS
• Two coaxial series-coupled fast-rotating barrels (1 turn in 3.2 hours),
one of which is equipped with a slipping spring to avoid excess tension
• Relief-engraved text, circular-grained
BALANCE WHEEL
• In-house variable-inertia with 6 gold mean-time screws (12.60mm diameter)
FREQUENCY • 21’600 vibrations/hour
BALANCE SPRING
• Phillips terminal curve
• Geneva-style stud
BRIDGES AND MAIN PLATES
• Titanium
• Frosted, polished bevelling and countersinks
• Multi-level, openworked suspended-arch bridge, straight-grained
and polished, polished bevelling and countersinks
MOVEMENT SIDE
• Frosted bridges, polished edges and bevelling
• Gold plate with engraved limitation number, circular-grained,
polished bevelling and countersinks, straight-grained flanks
ESCAPEMENT PLATFORM
• Titanium
• Inclined at a 30° angle
• Frosted, polished countersinks, large straight-grained inclined facet
• Multi-level, openworked balance wheel bridge, straight-grained and polished, polished bevelling and countersinks GEARING
• Involute circle profile
• Inclined gear and profiled teeth on intermediate wheels of the set hands mechanism and small seconds
DISPLAYS
• Hours and minutes, on suspended arch bridge
• Small seconds
• Power reserve on a sector

EXTERIOR

CASE
• In ceramic and 18k 5N red gold with curved synthetic
sapphire crystal
• Three-dimensional, variable geometry-shaped bezel,
hand-polished with hand-finished straight graining
• Ceramic profiled lugs, screwed fixing
• Transparent back with high domed synthetic sapphire crystal
• Titanium security screws, black treatment
• Raised engraving “Balancier Incliné” and “Greubel Forsey”
CASE DIMENSIONS
• Caseband diameter: 41.50mm
• Bezel diameter: 44.00mm
• Case height: 13.25mm
• Height on synthetic sapphire crystals: 14.80mm
WATER RESISTANCE OF THE CASE • Water-resistant 3atm - 30m – 100ft
(standard NIHS 92-20/SN ISO 22810:2010)
CROWN
• In 18k 5N red gold, titanium and rubber with GF logo
• Colour-coded rubber capping, interchangeable
DIAL SIDE
• Three-dimensional, variable geometry hour-ring, polished, with engraved and lacquered minutes indexes
• Three-dimensional, variable geometry hour indexes, polished, with Super-Luminova
• Power-reserve indicator, engraved and lacquered
• Gold small seconds dial, polished bevel, black treatment
HANDS
• Hours and minutes, curved profile, polished steel with Super-Luminova
• Small seconds, in polished steel, flat black polished head
• Power-reserve, red triangle
STRAP AND CLASP
• Hand-sewn textured rubber or rubber with text in relief
• 18k 5N red gold and titanium folding clasp, engraved GF logo

• 🔰Limitation 
• Limited Edition of 11 pieces.

🔴 Price  On request💰Approximate price: CHF 295,000.  

⚠️☎️For details, please contact me directly at marwa.turki@greubelforsey.com or by mobile at +41 79 468 94 69. Marwa.

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Press Release - 2026
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GREUBEL FORSEY SA
For further information: 
Communication Department 
press@greubelforsey.com – +41 79 194 2884
Eplatures-Grise -16 P.O. Box 670 
2301 La Chaux-de-Fonds - Switzerland
+41 32 925-4545
+41 32 925-4502
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