Vacheron Constantin Patrimony perpetual calendar ultra-thin 41 mm Midnight Blue Dial 18K Pink Gold Alligator Leather Strap 43175/000R-B519

An elegant interpretation of the perpetual calendar, this 18K pink gold watch houses an ultra-slim automatic movement, just 4.05 millimeters thick, which will keep perfect time until 2100. Set at the center of its blue dial, the 18K gold moon phase features a champlevé enamel sky and two hand-finished moons.