Greubel Forsey releases the final two editions of the Convexe S2, one in black ceramic with 5N red gold and the other in full white ceramic.
Press Release information with commentary in italics.
New: the closing chapter of the Greubel Forsey Convexe S2
The Greubel Forsey Convexe S² retails at CHF 295,000 before taxes. Limited Edition of 11 pieces each.
Commentary
As usual with Greubel Forsey, each movement will eventually close up. And in standard Greubel Forsey style, two final editions are released, both limited to 11 pieces each.
The movement remains the same as the one which we reviewed. We covered first edition in 2021 in a larger 43.5mm case, and reviewed it with a new bracelet in 2022, and again in 2023 with a smaller 42.5mm case. This novelty release, however is even smaller, with the specification at 41.5mm.
The movement is mainly ported over from the original Balancier in 2017, and carried over since. The new watch uses the same movement, we recommend reading the review, as we discuss the technical details of the complicated movement.
Release details
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. Housed in the signature Convexe case measuring 41.5mm across the caseband and built around the hand-wound 30° inclined balance wheel system, these editions represent the definitive expression 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.From its origin, the Balancier Convexe S² was designed as a fully integrated object in which case geometry and movement structure evolve together.
The Convexe architecture follows the natural curature of the wrist, allowing the three-dimensional movement to remain balanced, legible and comfortable in daily wear. Rather than enclosing the calibre, the case extends its architecture outward, reinforcing the dialogue between exterior form and mechanical construction.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. The movement is built around openness and perspective, with multi-level bridges and suspended structures designed to reveal rather than conceal mechanical function.
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. Titanium bridges and main plates are frosted and hand-finished with polished bevels, countersinks and carefully executed transitions between surfaces. 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. 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. Black-treated movement components and the ceramic case frame the architecture, while the red gold bezel and caseback introduce warmth and visual weight. The interplay between matte and polished surfaces amplifies the three-dimensional character of the movement and reinforces the sculptural nature of the Convexe case.
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 shadow. 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.
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. 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 wearability that defines the Convexe approach.
These two editions complete a five-year exploration of the Balancier Convexe S² calibre through different material and aesthetic interpretations.
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. 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.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.
Greubel Forsey Convexe S2
White ceramic / Ceramic and 5N red gold
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 white ceramic with curved synthetic sapphire crystal / In ceramic and 18k 5N red gold with curved synthetic• 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 / 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 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 / 18k 5N red gold and titanium folding clasp, engraved GF logo
