Here's the new one-of-a-kind Vacheron Constantin Maître Cabinotier Perpetual Calendar Regulator ref. 4000C/000R-B121 right on time for the 2015 Watches & Wonders in Hong Kong. With this new watch —a unique-piece—, Vacheron Constantin showcases its expertise in creating original and exclusive calibers providing a highly specific time read-off. This exceptional timepiece is distinguished by its regulator-type display, inspired by the precision clocks used to adjust watches from the 17th century onwards. Along with this dissociated display of the hours and minutes, the 2460 RQP movement specially designed for this model also drives a major horological complication: the perpetual calendar. An elegant hand-guilloché dial accentuates the exclusive nature of this watch certified by the Hallmark of Geneva, crafted in keeping with the spirit of the 18th century Geneva cabinotiers.