Vacheron Constantin Patrimony self-winding

Vacheron Constantin's Patrimony self-winding, reference 85515/000R-B644, measures 36.5 mm across in rose gold. The case stands 9.15 mm thick and pairs with a sapphire crystal, through which a display back reveals the movement. The watch is set with diamonds and carries a blue dial. The self-winding movement inside is calibre reference 2450 Q6/3, which carries the Geneva Seal and runs with 40 hours of power reserve. Central seconds and a date aperture round out the functions. The watch is fitted to an alligator leather strap with a pin buckle in rose gold. Vacheron Constantin rates the case to 30 metres of water resistance.