Vacheron Constantin's Grand Complication Gets a Transparent Makeover
With a minute repeater, split-second chronograph, and tourbillon regulator, it represents a bold expression of the brand's technical and artistic capabilities.
At the core of the Les Cabinotiers Temporis Duo Grand Complication Openface is the Calibre 2757 S, a movement comprising nearly 700 components. This intricate mechanism is visible through the open-faced sapphire dial and transparent case back, providing a rare view into the complexity of high-end watchmaking.
The movement integrates a single push-piece split-second chronograph, a minute repeater with a silent centripetal governor, and a tourbillon with a spherical hairspring for improved isochronism. Despite the high complication count, the movement remains slim at just 10.4 mm thick and 33.3 mm across.
Advanced materials such as titanium, aluminium, and silicon help reduce friction, increase efficiency, and support a 50-hour power reserve—even when the chronograph is in use.
Encased in 45mm of 5N pink gold, the watch reflects the Maison's legacy of engineering and design. The 0.5 mm-thick sapphire dial blends polished and frosted finishes, complemented by 5N gold rings, grey NAC-treated hour markers, and green PVD-coated aluminium chronograph hands. These elements match the green alligator strap, creating a cohesive visual identity.
The dial and case back showcase the calibre's fine hand-finishing. Bevelled edges, polished surfaces, and engraved details highlight the craftsmanship behind each part. The blackened bridges on the movement's reverse are sandblasted and outlined with mirror-polished sinks, revealing the architectural depth of the design. Even the striking governor bears the engraved initials of Jean-Marc Vacheron, a subtle nod to the brand's heritage.
Functionally, the split-second chronograph is driven by two dedicated column wheels—one for the chronograph and the other for the rattrapante. Time is recorded to 1/5th of a second via two central seconds hands and a 30-minute counter at 2 o'clock, controlled through intuitive pushers at 2 and 4 o'clock.
The minute repeater uses a silent flying strike governor, balancing centrifugal and centripetal forces to regulate the chimes without mechanical noise, delivering crisp and clear sound on demand.
What sets this timepiece apart is the sheer attention to detail in its finishing. Each of the 696 components has been meticulously hand-finished, with some taking longer to decorate than to assemble. Techniques such as mirror polishing, sandblasting, and hand-bevelling create a dynamic interplay of textures and light that enhances the visual complexity of the movement.
While these complications have historically appeared in pocket watches, combining them in a wristwatch remains rare. The Les Cabinotiers Temporis Duo Grand Complication Openface defies convention, uniting three of horology's most demanding mechanisms in a refined, transparent case. Related
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