The present watch is the Greubel Forsey Double Balancier Convexe in titanium, a monumental expression of contemporary chronometry and architectural watchmaking. This limited edition unites the Maison’s signature Convexe case geometry with one of its most technically sophisticated regulating systems: the Double Balancier combined with a 4‑minute spherical constant differential.

Crafted in lightweight titanium, the three‑dimensional Convexe case curves ergonomically to the wrist while maintaining bold presence. Measuring 42.50 mm at the caseband and 44.40 mm at the bezel, with a height of 13.75 mm (14.35 mm including crystals), the case features a variable-geometry bezel with hand‑polished and straight‑grained surfaces. Curved synthetic sapphire crystals front and back enhance the watch’s sculptural profile, while titanium security screws and raised engravings reinforce its technical identity. Water resistance is rated to 100 meters (10 ATM).

At the heart of the watch lies a hand‑wound in‑house movement comprising 371 components and 50 jewels, including olived‑domed jewels set in gold chatons. Two inclined balance wheels, each set at 30°, operate independently before their rates are averaged by a patented spherical constant differential that completes one full rotation every four minutes. This three-dimensional differential—constructed from 30 components—ensures optimized chronometric stability while serving as a captivating visual centerpiece on the dial.

The twin coaxial fast‑rotating barrels, mounted in series, provide a 72‑hour chronometric power reserve, with one barrel incorporating a slipping spring to prevent excess tension. The movement measures 37.70 mm in diameter and 9.46 mm in thickness, operating at 21,600 vibrations per hour. The variable‑inertia balance wheels (10 mm diameter) feature gold mean‑time screws and Phillips terminal curve balance springs, enhanced by an anti‑shock system with gold pin.

Finishing is exemplary throughout. Titanium bridges and plates are frosted with polished bevelling and countersinks, treated in grey tones. The escapement platforms—each composed of 70 parts—are inclined at 30° and supported by polished steel pillars and openworked bridges finished to mirror standards. The flat black polished steel differential bridge on the movement side underscores Greubel Forsey’s mastery of high-end decorative techniques.

The dial architecture reflects the same depth and dimensionality. A suspended, three-dimensional hour ring with engraved and lacquered minute circle frames the display, complemented by polished Super‑Luminova hour indexes. Gold elements highlight the differential rotation and small seconds, while curved-profile polished steel hands provide legibility and elegance. The power reserve is indicated on a sector, with a red or blued pointer depending on the version.

The titanium crown, polished and frosted with straight graining and engraved GF logo, completes the ensemble.

The Double Balancier Convexe is not merely a dual-regulator watch—it is a three-dimensional chronometric sculpture, blending patented innovation, uncompromising finishing, and mechanical artistry into one of the most sophisticated timepieces in modern haute horlogerie.