A Closer Look At The Les Cabinotiers Temporis Duo Grand Complication
Vacheron Constantin continues to expand its realm of technical mastery and artistic expression with the release of the Les Cabinotiers Temporis Duo Grand Complication Openface, a unique piece created as part of its Les Cabinotiers bespoke division. Designed as a one-of-a-kind creation, the watch brings together a minute repeater, tourbillon, and split-seconds chronograph, all housed within a striking openworked display crafted from sapphire.
A Contemporary Presentation of Classical Watchmaking
Encased in 18K pink gold, the Temporis Duo is a showcase of high complication in a format that veers away from classical aesthetics. Its sapphire dial reveals a layered, finely executed movement and brings a contemporary flair to an otherwise traditional architecture.

The dial layout departs from convention with its asymmetrical arrangement: hours and minutes are displayed at 9 o’clock, the chronograph minutes at 2 o’clock, and the small seconds – driven by the tourbillon – at 6 o’clock. Each subdial features frosted sapphire chapter rings, surrounded by pink gold rings applied via metal vapor deposition on the underside of the dial. The design gives the impression of floating mechanics, offering full visibility into the split-seconds chronograph components.
Complication Meets Clarity
At the heart of the Temporis Duo is the Calibre 2757 S, a hand-wound movement derived from the well-established Calibre 2755. The base movement integrates a minute repeater with a centrifugal governor and a tourbillon, while the chronograph complication is layered above using a traditional split-seconds mechanism, complete with twin column wheels and a pincer-operated rattrapante system.

An innovative lateral clutch system enables the chronograph to draw power from the tourbillon’s driving wheel, optimizing the use of vertical space and contributing to the watch’s unique mechanical architecture. This configuration, while complex, enhances the visual and functional interaction between the tourbillon and chronograph systems.

Adding further technical refinement is the incorporation of a spherical hairspring in the tourbillon. Unlike the flat or cylindrical varieties, the spherical hairspring provides more concentric oscillation, promoting improved isochronism and reduced positional variation — critical for a watch of this caliber. This type of hairspring has previously appeared in Vacheron Constantin’s Les Cabinotiers Armillary Tourbillon and underscores the brand’s ongoing pursuit of precision.
Traditional Craft in a Modern Finish
While the movement adheres to traditional construction and high-complication design principles, its aesthetic is deliberately modern. The bridges are frosted and bordered with straight-grained edges, creating contrast and depth. Relief-engraved markings, along with the Geneva Seal and a raised Maltese cross, reinforce both the craftsmanship and the heritage associated with the manufacture.

Viewed from the caseback, the intricate layout of the minute repeater becomes visible. The hammers, gongs, and centrifugal governor are prominently displayed, along with a power reserve indicator that provides practical information on the hand-wound movement’s autonomy.
Dimensions and Design
The watch’s 45 mm diameter and 16.40 mm height are directly influenced by its technical content. The substantial case size accommodates the movement’s multi-level construction and ensures optimal resonance for the repeater’s acoustic performance. The Traditionnelle-style case features clean lines and integrated design elements, including stylized lugs inspired by the brand’s Maltese cross emblem.

A Singular Achievement in Haute Horlogerie
The Les Cabinotiers Temporis Duo Grand Complication Openface is a masterclass in integrating traditional watchmaking with a bold, modern presentation. Through its sapphire dial and layered calibre, it reveals not just the artistry of mechanical timekeeping but also the innovation that defines Vacheron Constantin’s Les Cabinotiers atelier.
As a unique piece, this creation is both a collector’s treasure and a technical landmark, blending legacy, precision, and transparency in one of the most complex open-dial wristwatches of recent years.
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General Specifications:
Brand: Vacheron Constantin
Model: Les Cabinotiers Temporis Duo Grand Complication Openface
Reference: 9750C/000R-215C
Dial: Openworked
Case Material: 18K 5N pink gold
Case Dimensions: 45 mm Diameter, 16.40 mm thickness
Crystal: Sapphire Glass
Case Back: Sapphire Glass
Water Resistance: No
Strap: Green alligator leathe strap with a 18k 5N pink gold folding clasp
Calibre: 2757 S
Dimensions: 33.30 mm Diameter, 10.40 mm thickness
Functions: hours, minutes, 60-seconds tourbillon, minute repeater, power reserve indicator, chronograph
Winding: Hand-wound
Frequency: 2.5 Hz (18,000 Vph)
Jewels: 61
Components: 696
Power Reserve: 58 Hours
Price: Available upon request
Limited Edition: Yes, unique piece



