Vacheron Constantin’s Patrimony collection draws inspiration from the elegance of the 1950s. At SIHH 2016 a new model was introduced bearing the prestigious Hallmark of Geneva. Patrimony Perpetual Calendar Collection Excellence Platine joins the Collection Excellence Platine.
The watch is powered by the legendary Caliber 1120 QP, an ultra-thin mechanical self-winding movement developed and crafted by Vacheron Constantin. It drives the hours and minutes hands, the moon phases at 6 o’clock along with a perpetual calendar displaying the day of the week in a counter at 9 o’clock, the date in a counter at 3 o’clock, the month and leap year in 48-month counters at 12 o’clock. It’s designed to stay accurate without any corrections until March 1, 2100.
Unlike simple calendars requiring manual correction after every month with less than 31 days, the perpetual calendar takes account of the leap-year cycle with its 31-, 30- and 28-day months, as well as the quadrennial recurrence of February 29th. It requires significant miniaturization in order to achieve an ultra-thin perpetual calendar that mechanically adjusts to keep track of calendar irregularities.
Vacheron Constantin Caliber 1120 QP measures just 4.05 mm thick, beats at the frequency of 2.75 Hz (19,800 vibrations per hour), and has a 40-hour power reserve. The new Patrimony Perpetual Calendar is crafted in 950 platinum case, as is the dial.
The slightly convex external zone is adorned with a circular “pearl” minute-track and 18K white gold applied hour-markers. The hours and minutes hands are in 18K white gold, while the calendar pointers are in blued steel. Setting the finishing touch, the saddle-finish dark blue alligator strap is hand-stitched with silk and 950 platinum threads, and secured by a folding clasp in the same metal.
Revolving beneath the dial, the moon disc depicts the vault in white gold enhanced by a blue galvanic treatment. Each star has been crafted so as to provide an exact map of the sky. The sapphire case back affords a view of Caliber 1120 QP. This model will be launched in a strictly limited and numbered 100-piece edition.