With its carefully structured design, the Gouverneur Perpetual Calendar watch is the embodiment of perfect harmony in its forms, combined with all Piaget's technical expertise. With its subtle intertwining of round and oval forms, this luxury watch in the Black Tie collection encloses its exceptional mechanical structure in an aesthetic exterior that is soft, sophisticated and harmonious. Housed in a white gold gem-set case that is water-resistant at 30 meters, this perpetual calendar is equipped with an 855P calibre self-winding mechanical movement that offers hours, minutes and small seconds functions, together with a dual time zone display with day/night indicator and retrograde day of the week, date, month and leap-year indications. Fitted with a power reserve of approx. 80 hours, this complication movement is decorated with entirely hand-crafted Haute Horlogerie finishes: circular Côtes de Genève, circular-grained bottom plate, bevelled bridges, and blued screws.