Les Cabinotiers,
The Berkley Grand Complication

Vacheron Constantin presents the world's most complicated watch. Comprising 63 horological complications and 2,877 components, it surpasses the prior record, also held by the Maison.

THE PINNACLE OF HIGH WATCHMAKING

Stemming from 11 years of development, including a year entirely devoted to its assembly, Les Cabinotiers - The Berkley Grand Complication is a milestone in contemporary watchmaking history, born from the will of the its commissioner, who has chosen to give it his name.

THE FIRST CHINESE PERPETUAL CALENDAR

The main innovation of Les Cabinotiers - The Berkley Grand Complication is its traditional Chinese perpetual calendar. Given the particularities of its complex and irregular cycle, the mechanical programming of in-house Calibre 3752 through to the year 2200 is a feat of horological genius.

Chinese Calendar

A complex and irregular system

Chinese calendar months are lunar and begin on the day of the new moon. Depending on the lunar month, the common Chinese year can, therefore, have 353, 354 or 355 days and the embolismic year 383, 384 or 385 days.

New year date

CHINESE NEW YEAR DATE

Vacheron Constantin’s watchmakers went so far as to offer a disc-type display of the exact – yet by definition variable – date of the Chinese New Year. This in itself represents another major accomplishment, as this key date in the nation’s social life fluctuates continuously between January 21 and February 21.

Zodiac signs

CHINESE ZODIAC SIGN

The silhouette of the Chinese zodiac animal for the current year appears in an aperture positioned below the moon phases.

AN ASTRONOMICAL WATCH

Vacheron Constantin’s watchmakers did their utmost to incorporate the full range of horology’s noblest complications into this watch, be they in the realm of astronomical and chiming functions, as well as useful complications in terms of chronometry, alarms and time zones – all governed by a determination to achieve very high precision.

GREGORIAN CALENDAR

GREGORIAN PERPETUAL CALENDAR

An astronomical watch par excellence, the Gregorian perpetual calendar is displayed on the watch’s second face. The display comprises a retrograde date at 12 o'clock, complemented by the day of the week (9 o'clock counter), the month (3 o'clock counter) and the leap-year cycle (1 o'clock aperture).

SKY CHART

CELESTIAL SKY CHART AND SIDEREAL TIME INDICATIONS

The watch's astronomical references are not confined to calendars. Also visible on the back is a sky chart with the constellations appearing in real time as observed from Shanghai. For the sake of accuracy, this celestial disc makes one complete rotation in one sidereal day.

AGE OF THE MOON

AGE AND PHASES OF THE MOON

The precision phases and age of the moon appear on the 12 o'clock counter, with no need for corrections over a full 1,027 years.

GRANDE SONNERIE AND ALARMS

The Vacheron Constantin watchmakers were keen to equip Calibre 3752 with a Grande Sonnerie mechanism featuring a Westminster carillon. This chimes the tune sounded by the bells of Big Ben – on London’s Tower of Parliament – with 5 gongs and 5 hammers, complemented by an alarm.

A HIGH-PRECISION WATCH

This addition of astronomical and chiming complications should not detract from the watch's primary function, which is to display the time – or better still, to display the time in several time zones and even to measure short times, with chronometric precision.

Tourbillon

Triple-axis tourbillon regulator

The master watchmakers developed a triple-axis armillary tourbillon regulator, operating at a frequency of 2.5 Hz (18,000 vibrations per hour) and fitted with a spherical balance-spring, offering a high degree of precision in the operation of the complications.

Display & chronograph

Precision display and split-second chronograph

The time display is of the regulator type: the hour hand (12 o'clock counter on the front) is separate from the central minute hand and the second hand (6 o'clock counter). To enhance this display, the small seconds are the retrograde kind. The watch's chronograph, accurate to the nearest fifth of a second, features a split-second function.

WORLD TIME

Second time zone and world time

The watch displays world time, a function visible on the back. A 10 o'clock aperture enables the wearer to select one of the 24 time zones with the time differential in relation to the Greenwich meridian. Below, the 9 o'clock counter shows the hours and minutes over a 12-hour period in a second time zone, with the corresponding day/night indication at 11 o'clock. 

FINISHING AND HAND DECORATIONS

Les Cabinotiers - The Berkley Grand Complication represents a technical feat that is further enhanced by its restrained, elegant aesthetic and impeccable level of finishing. The time devoted to decorating and finishing the 2,877 components, including the invisible convolutions of the mechanism, result in a watch where complexity contributes to its overall elegance and harmony.

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