Integrated caliber 3600

The extremely complex and exclusive new Caliber 3600 called for five years of development. This mechanical manual-winding movement comprises 23 complications, including three distinct times driven by three dedicated gear trains. A tropical gear train which simulates the tropical year, meaning the elliptical orbit of the Earth around the Sun, was designed to enhance the precision of the solar functions. A three-week power reserve is ensured by six barrels, coupled by threes. A true feat of miniaturisation and engineering, this caliber measuring just 8.7 mm thick comprises a total of 514 components.

Developed and crafted by Vacheron Constantin

Integrated Caliber 3600

INDICATIONS

Hours, minutes, perpetual calendar, day/night indication, precision moon phase, age of the moon, running equation of time, sunrise and sunset, length of day and night, seasons, solstices, equinoxes and zodiacal signs, tide level indicator, Sun-Earth-Moon conjunction, opposition and quadrature, transparent celestial chart of the Northern Hemisphere with indication of the Milky Way, the ecliptic and the celestial equator, celestial time hours and minutes, tourbillon, 3-week power reserve (6 barrels), power reserve indication.

Key points

An astronomical grand complication

Les Cabinotiers Celestia Astronomical Grand Complication 3600 features a total of 23 complications on its twin sides. On the mainplate (front) side, the dial displays civil time indications (including a perpetual calendar with a precision moon phase), solar time indications and a mareoscope with Earth-Moon-Sun alignment. The bridge side (back dial) features an innovative and transparent celestial chart indicating sidereal time, for which a patent has been filed.

Running equation of time on a tropical gear train

The 'running' equation of time is extremely rare due to its complexity and enables instant reading of true solar time by means of an additional coaxial minutes hand. To ensure exactitude and precision, Vacheron Constantin has developed a tropical gear train simulating the tropical year, to which the solar hand is set. This complication is an authentic watchmaking feat for which a patent has been filed.

Transparent celestial chart

A celestial chart of the Northern Hemisphere has been created on the back of this mechanical masterpiece. Indicating the constellations, the Milky Way as well as projections of the celestial equator and the ecliptic, this sky map was devised in an innovative way involving two superimposed sapphire discs. This construction, for which a patent has been filed, makes it possible to admire the finishing of Caliber 3600. The finely grained bridges and the transparent jewels are designed to ensure optimal legibility of sidereal time.

Design and finishing

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Optimal legibility

The slate grey front dial provides a harmonious display of complications. On the back, the matt finishing and the transparent jewels enable clear readings of the indications appearing on the sapphire discs.

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Refined finishing

The 514 components of the caliber measuring just 8.7 mm thick are meticulously adjusted and decorated by hand, a process calling for extreme dexterity.

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Aesthetic details

Les Cabinotiers Celestia features remarkable finishing such as the engraved moon craters or the 3D depiction of the Earth-Moon-Sun alignment.

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Sidereal transparency

Composed of two superimposed sapphire discs, the back dial reveals all the originality of its translucent sky map.

Technical specifications

Les Cabinotiers Celestia Astronomical Grand Complication 3600

  • Reference
    9720C/000G-B281
    Hallmark of Geneva certified watch
  • Case
    18K white dial
    45 mm in diameter,
    13.6 mm thick
    Transparent sapphire crystal case-back
  • Dial
    Opaline slate grey
    18K gold applied hour-markers and hands
  • Strap/bracelet
    Black Mississippiensis alligator leather with alligator leather lining, large square scales
  • Buckle/clasp
    18K white gold pin
    Polished half Maltese cross-shaped
  • Engraving
    "Pièce unique" and "Les Cabinotiers" inscriptions on the back of the watch

Integrated caliber 3600

  • Movement
    Mechanical manual-winding
  • Diameter
    36 (15 ¾’’’)
  • Thickness
    8.7
  • Power reserve
    Approx. 3 weeks (21 days)
  • Frequency
    2.5Hz (18,000 vibrations/hour)
  • Number of components
    514
  • Number of jewels
    64

Astronomical watches

Our astronomical watches

Our astronomical watches

From the 19th century to the present day, the history of astronomical complications at Vacheron Constantin has been punctuated by a longstanding tradition of horological expertise.

Discover the entire range of astronomical watches in the various collections of the Manufacture.

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