The new Calibre 2253 was created by the brand’s engineering department. The development of the movement required more than several thousands of hours. It provides such sophisticated functions as a perpetual calendar, the equation of time and the times of sunrise and sunset. Moreover, it incorporates a tourbillon escapement.
The equation of time, one of the most charming horological complications, serves for indicating the difference in minutes between the variable solar time revealed by a sundial and the constant mean time of wristwatches and clocks. It should be mentioned that solar time and mean time coincide just four times a year, exactly on April 15, June 14, September 1 and December 24. As for the rest of the year, the difference between solar and mean time varies from - 16 minutes to + 16 minutes.
Instruments able to calculate the equation of time are very rare, having been created only by highly accomplished horologists.
In the Patrimony Traditionnelle “Calibre 2253” watch, the work of the equation of time complication depends on the equation cam, representing a waisted oval, the shape of which reminds a figure 8. Its calculation is performed according to the daily declination of the sun observed from a given point. With the cam rotating once a year, a special hand follows its contour, indicating the equation of time between 10 and 11 o’clock on the dial.
The new Vacheron Constantin watch displays another rare horological function - the sunrise and sunset times throughout the year at a given region. This complication also works with help of a cam, with its outline calculated according to the latitude of the region. It is remarkable that the brand’s clients can choose the region of the sunrises and sunsets.
The tourbillon carriage features the signature shape of Vacheron Constantin’s emblem, a Maltese Cross. It rotates once a minute, being presented at 6 o’clock, along with the small seconds indication.
The perpetual calendar indications are positioned symmetrically - the days, the months and the dates are found at 9, 12 and 3 o’clock respectively. The leap-year indicator performs a circumspect appearance in the upper right part of the dial.
The sophisticated finish of the Patrimony Traditionnelle “Calibre 2253” watch reflects its complicated nature. The case of the Vacheron Constantin watch, 43 mm in diameter, is crafted in 950 platinum, along with the dial, the crown and the folding clasp shaped as a half of a Maltese Cross. It is remarkable that even the Dauphine hands indicating the hours and minutes are rendered in the same material, representing an outstanding technical prowess.
The dial demonstrates alternating silvered and frosted surfaces, being completed with snailed chapters, circular-brushed sub-dials and diamond-polished filets, as well as applied hour markers and Maltese Cross crafted in white gold. The dial is shielded by a convex sapphire crystal with anti-reflective coating on one side.
The Calibre 2253 movement is crowned with the prestigious Hallmark of Geneva, rightfully considered to be the seal of horological perfection, reserved for very few Geneva manufacturers. The movement boasts Cotes-de-Geneve, circular graining, chamfering and straight graining of the steelwork completely performed by hand.
The sophisticated movement comprises 457 parts and is just 9.60 mm thick. The frequency of the balance is 18,000 vibrations per hour.
The Vacheron Constantin Patrimony Traditionnelle “Calibre 2253” watch will be available in an extremely limited edition of just 10 pieces. The timepiece, reviewed by Watches.InfoNIAC.com, is 30-meter water-resistant. It is secured to the wrist on a dark blue alligator leather strap, hand-stitched with a platinum thread.