GRAND
COMPLICATIONS
When artistry meets mechanical mastery in haute horlogerie. Grand complication push the boundaries of watchmaking while staying unmistakably true to the Maison’s “No Compromise” philosophy.
TWO DIALS, ONE VISION
The fumé version transitions from smoked ruthenium to near darkness at the dial’s edge, its vertical sunburst grille lending the composition an architectural, almost structural depth. In contrast, the open-worked sapphire version dissolves the boundary between dial and movement, revealing the mechanical architecture beneath with clarity and lightness.
Precision beyond time
With 505 individual components in total, the watch is only 10mm thick and weighs just 97 grams, making it extremely comfortable and ergonomic. At its heart beats a century of precision, where days, months, and lunar cycles move in flawless, perpetual harmony, never needing correction for over 100 years.
The first and only city map on a watch caliber
Gerald Charles developed a proprietary finishing, the curved Côtes de Genève, rarely found elsewhere, to represent the waves of the lake Léman in Geneva. The balance wheel evokes the water fountain, while the vertical straight Geneva stripes represent the city’s roads. Completing the story, a black ruby marks the position of the Atelier at Rue du Mont-Blanc 3, Geneva. An extremely complex finishing, and a first in watchmaking.
Curved Côtes de Genève
Unlike traditional straight finishing, the curved Côtes de Genève decoration must follow the curves of the Maestro architecture with perfect regularity and depth. With no existing tools capable of executing it on a shaped movement, the technique had to be created specifically, turning the curve itself into the challenge.
The most accurate moon indicator
Thanks to the distinctive architecture of the movement, Gerald Charles was able to integrate an oversized moon-phase display with an exceptionally large moon disc. Its gear system features three times more teeth than a conventional indicator, allowing the disc to advance several times per day for a more faithful alignment with the real lunar cycle over time.
A moon true to nature
The moon itself is crafted using advanced nano-engraving technology, reproducing the lunar surface with remarkable realism. Each crater is rendered from the actual topography of the moon, creating a display that is not only mechanically precise, but also visually true to nature.
A watch of refined craftsmanship
Every one of the GCA11000 movement’s 306 components is finished by hand. Plates are adorned with hand-executed anglage, while gears and screws are individually finished with the same attention to detail. The stainless-steel levers are as fine as a human hair, yet engineered with the elasticity required to absorb the micro-shocks generated by the indications. This reduces the risk of breakage or jamming and ensures lasting resilience, especially in a perpetual calendar, where six separate displays demand far more gear-train activity than a conventional watch.
Architecture revealed
In the open-worked version, this artistry is revealed through the sapphire dial, allowing the architecture of the movement to become part of the watch’s visual identity. Not simply a watch, but a collectible mechanical sculpture.
STEP INTO OUR ATELIER
In the heart of Geneva, our Atelier is more than a place. Engage directly with the collections, explore the Museum, and discover the story of Mr. Genta.