- Movement
- Manual winding
- Size
- 41.50 mm
Overview
The smallest Convexe, closed with two ceramic editions
The Greubel Forsey Balancier Convexe S², Carbon execution, in carbon and titanium, 41.5 mm and 14.8 mm overall (12.85 mm case), water-resistant to 50 m. Hours, minutes, small seconds and power reserve on a manually wound movement with carbon-and-titanium bridges and the balance wheel system inclined at 30°; a limited edition of unpublished size.
The Balancier Convexe S² is the smallest watch Greubel Forsey has made in the Convexe collection, at 41.5 mm, and the brand presents it as the first of a turn toward more architectural designs. In 2026 the brand closed the model, which it describes as retired deliberately rather than allowed to lapse.
The case is curved front and back. On the back it hugs the wrist; on the front the flange plunges toward the vertical axis at 12 and 6 o'clock, which is what gives the dial its depth. The movement is manually wound with hours, minutes, small seconds and a power reserve of 72 hours, and its balance wheel system is inclined at 30°. Bridges and plates are frosted by hand with polished bevels, with the same treatment on parts that do not show.
For collectors
By the brand's own account the S² leaves behind five years of work in case architecture, inclined regulation and finishing at the limit of what titanium and ceramic allow.
Key details
Design and engineering
- Convexe caseCurved on both faces; the front flange dips to the vertical axis at 12 and 6 o'clock. 41.5 mm across and 14.8 mm overall — the smallest Convexe diameter the brand has made.
- 30° inclined balanceThe Greubel Forsey balance wheel system sits at 30° to the dial.
- Hand-frosted bridges and platesBridges and main plates are frosted by hand with polished bevels and clean surface transitions, on every component whether visible or not.
Movement
- Manual winding; hours, minutes, small seconds, power reserve
- 30° inclined Greubel Forsey balance wheel system
- Bridges and main plates hand-frosted — titanium, or carbon and titanium in the Carbon execution; black-treated in the black ceramic edition
- 21,600 vibrations per hour
- Power reserve 72 hours
The reference
Technical specifications
| Collection | Balancier |
|---|---|
| Movement | Manual winding |
| Functions | Manual winding movement, hours and minutes, small seconds, power reserve, 30˚ inclined Greubel Forsey balance wheel system |
| Case dimensions | 41.50 mm |
| Case thickness | 12.85 mm (14.80 mm including sapphire crystals) |
| Case material | Carbon and titanium |
| Water resistance | 5 atm - 50 m - 164 ft |
| Power reserve | 72 hours |
| Frequency | 21,600 vibrations/hour |
| Limitation | Limited edition |
| Reference | Not published by the brand — sourced by model and execution |
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