Vacheron Constantin has launched two new iterations of its Traditionnelle Perpetual Calendar Ultra-Thin in a 36.5mm casing. These new models are notable as they are the first within this series to be released without gemstone embellishments. When first introduced in 2022, the Traditionnelle Perpetual Calendar was marketed as a women's watch, characterized by diamond settings and mother-of-pearl dials. This current release highlights a significant shift in market dynamics, illustrating how quickly brands are moving away from traditional gender classifications in watchmaking to embrace more versatile, unisex designs. The latest Traditionnelle Perpetual Calendar embodies this evolution, presenting itself as an appealing, compact choice for both men and women. It seamlessly blends refined aesthetics, advanced technical features, and subtle sophistication, all driven by the brand's distinguished ultra-thin automatic calibre 1120 QP.

Vacheron Constantin, with its extensive and distinguished heritage, can draw upon a wealth of historical accomplishments to trace the evolution of its intricate complications, including the ultra-thin perpetual calendar. The sophisticated perpetual calendar mechanism, which is meticulously engineered to accurately manage the complexities of the Gregorian calendar—such as varying month lengths and leap years—first appeared in 1884 within a double-faced observatory timepiece. Concurrently, the Maison's commitment to ultra-thin calibres also boasts a rich historical lineage, originating in the early 20th century with ultra-thin pocket watch movements. This pursuit of slenderness culminated in the creation of a world-record-breaking 0.94mm-thin calibre, housed in a 1931 platinum pocket watch. Further solidifying its reputation, in 1955, coinciding with the brand's bicentenary, the wristwatch calibre 1003, with its remarkably slender 1.64mm height, set new industry benchmarks for thinness.

The current iteration of the ultra-thin automatic calibre 1120 QP, which is central to this discussion, first debuted in 1983. It gained prominence in the iconic ref. 43031, a timepiece instrumental in reinvigorating interest in complex watchmaking after the significant downturn caused by the quartz crisis. This movement, notably, is derived from the renowned JLC calibre 920, a base movement extensively utilized by other prestigious watchmakers such as Vacheron Constantin (for models like the 222), Patek Philippe (for the Nautilus 3700), and Audemars Piguet (for the Royal Oak 5402). Produced for two decades, the ref. 43031 measured less than 8mm in thickness with a 36mm diameter, and is widely regarded as the foundational inspiration for the modern Traditionnelle Perpetual Calendar. Drawing from the precise dimensions of the 43031, the new case features a diameter of 36.5mm and a thickness of 8.43mm. Its classic round shape, straight lugs, and slender bezel are meticulously polished, maintaining a subtle and understated profile.

The watch's traditional silver opaline dial and the arrangement of its functions draw inspiration from the 43031 model. It features three symmetrically placed sub-dials: the month and leap year indicator at 12 o'clock, the date at 3 o'clock, and the day of the week at 9 o'clock. These are complemented by a moon phase and age display positioned at 6 o'clock. Each of the three sub-dials is accentuated with snailed interiors and uses gold hands that match the signature gold faceted Dauphine hour and minute hands, as well as the applied baton markers. Consistent with most Traditionnelle models, excluding those categorized as high jewelry, the outer edge of the dial features a black railway-style minute track, further enhancing its classic aesthetic.

Vacheron Constantin's philosophy in crafting ultra-thin timepieces transcends the competitive pursuit of the thinnest calibre merely for accolades. Instead, the brand meticulously balances technological innovation, aesthetic appeal, and robust functionality. The in-house automatic calibre 1120 QP, visible through the caseback, is a testament to this approach. Comprising 276 components and measuring a mere 4.05mm in thickness, this movement operates at a frequency of 19,800 vibrations per hour (2.75Hz) and offers a 40-hour power reserve. It manages the display of hours, minutes, a perpetual calendar (including date, day, month, and leap year), and the age and phases of the moon. Certified by the esteemed Hallmark of Geneva, the movement showcases exquisite Côtes de Genève decoration on its bridges and an open-worked rotor featuring the brand's distinctive Maltese Cross emblem, along with a 22k gold outer segment.

This timepiece demonstrates that a compact 36.5mm watch can effectively integrate a wealth of complex information without compromising readability or its inherent elegance. Vacheron Constantin's decision to broaden the appeal of this perfectly proportioned, compact watch beyond an exclusively female audience is a commendable and forward-thinking move.

The white gold iteration is elegantly paired with a light brown alligator leather strap, while the pink gold version features a blue alligator strap, both secured with coordinating gold pin buckles. Both new Traditionnelle Perpetual Calendar Ultra-Thin models are priced at CHF 86,500.