Vacheron Constantin Patrimony retrograde day-date

Vacheron Constantin's Patrimony retrograde day-date, reference 4000U/000P-H003, is a 42.5 mm platinum watch. The case measures 9.7 mm thick and carries a sapphire crystal over a salmon dial with sunburst finishing. Inside is the self-winding calibre 2460 R31R7/3, carrying the Hallmark of Geneva and running with a 40 hour power reserve. The retrograde day and date functions share the dial with a central seconds hand, and a sapphire caseback shows the movement's finishing. This is a chronometer-grade watch built to Vacheron Constantin's own certification standards. The dial pairs with a dark blue alligator leather strap closed by a platinum folding clasp. Water resistance is a modest 30 metres, in keeping with the watch's dress orientation.