Patrimony perpetual calendar ultra-thin

CASE : 18K 5N pink gold, sapphire caseback, waterresistant to 30m

SIZE : 41mm, 8.9mm thick

MOVEMENT : mechanical self-winding Vacheron Constantin Caliber 1120 QP, 19,800 vph, 40h power reserve

FUNCTIONS : hours, minutes, perpetual calendar (day, date, month, leap year) moon phases

DIAL : midnight blue, sunburst satin-brushed, applied hour-markers in 18K 5N pink gold

STRAP : midnight blue Mississipiensis alligator leather with leather lining, 18K 5N pink gold folding clasp shaped like a half Maltese cross

Calendar rhapsody in blue

At the SIHH last January, Vacheron Constantin introduced a midnight blue colour into in a trio of Patrimony models and the new perpetual calendar is part of this lineage. It offers aesthetes a more contemporary alternative to the existing ultra-thin Patrimony perpetual calendar versions, in pink gold with white or anthracite dial, or belonging to the Excellence Platine line. The midnight blue dedicated to the collection features a sunburst satin-brush that lights up the dial unanimously acclaimed for its aesthetic harmony and readability. Positioned in a pyramid-style layout, the three counters for the day, date and month can be read at a glance and the eye can then glide over the moon, whose golden hue matches the red gold of the case, hour-markers and hands. The relative sobriety of the dial should not eclipse the technical prowess of the perpetual calendar – providing a mechanical solution to an astronomical problem – especially since the movement must be housed in a case less than 9mm thick. Vacheron Constantin’s first perpetual calendar dates back to an 1883 pocket watch. Since then, the Manufacture has constantly improved and miniaturized its movements. Concentrated within a thickness of just 4.05mm, the 1120 QP in-house caliber is able to handle calendar information without any need for correction until 2100.