Overseas Perpetual Calendar Ultra‑Thin Skeleton

Vacheron Constantin Overseas Perpetual Calendar Ultra‑Thin Skeleton 4300V/120G‑B946

The Vacheron Constantin Overseas Perpetual Calendar Ultra-Thin Skeleton Ref. 4300V/120G-B946 represents one of the most sophisticated interpretations of the Overseas collection, combining ultra-thin watchmaking, a perpetual calendar complication, and fully skeletonized architecture.

The watch features a 41.5 mm case crafted in 18K white gold, measuring an exceptionally slim 8.1 mm thickness. The design incorporates the iconic Maltese cross-inspired bezel, a hallmark of the Overseas line. Alternating polished and satin-brushed finishes emphasize the refined sport-luxury character of the case.

The skeletonized sapphire dial reveals the intricately openworked movement beneath, allowing a full view of the mechanical architecture. Sub-dials with blue chapter rings display the perpetual calendar indications, while the moon phase display features 18K gold moons set against a deep blue starry sky. White gold hands and indices with luminous coating ensure legibility despite the complex dial structure.

The case construction includes a screw-down crown, scratch-resistant sapphire crystal, and a transparent sapphire caseback, offering 50 meters of water resistance.

At the heart of the watch is the Vacheron Constantin Calibre 1120 QP SQ, an automatic movement based on the legendary ultra-thin 1120 architecture, extensively skeletonized for this model. The movement consists of 276 components and 36 jewels, operating at 19,800 vibrations per hour (2.75 Hz). It carries the prestigious Hallmark of Geneva (Poinçon de Genève) certification, guaranteeing exceptional finishing and precision.

The calibre powers a perpetual calendar, displaying:

• Day of the week

• Date

• Month

• Leap year cycle

• Moon phase

Once correctly set, the perpetual calendar automatically accounts for months of varying length and leap years, requiring adjustment only in the year 2100.

The watch is delivered with Vacheron Constantin’s interchangeable strap system, allowing quick changes between a white gold bracelet, alligator leather strap, or rubber strap, all secured with a triple-folding clasp.

Key Specifications

• Reference: 4300V/120G-B946

• Collection: Overseas

• Case Material: 18K white gold

• Bezel: Maltese cross-inspired polished/satin finish

• Diameter: 41.5 mm

• Thickness: 8.1 mm (ultra-thin)

• Dial: Skeletonized sapphire with blue calendar counters

• Calibre: Vacheron Constantin 1120 QP SQ, automatic

• Components: 276

• Jewels: 36

• Frequency: 19,800 vph (2.75 Hz)

• Functions: Hours, minutes, perpetual calendar, moon phase, leap year indicator

• Power Reserve: ~40 hours

• Certification: Hallmark of Geneva

• Water Resistance: 50 meters (5 ATM)

• Bracelet/Straps: White gold bracelet + interchangeable leather and rubber straps with triple folding clasp