Vacheron Constantin Patrimony Traditionnelle World Time Rose Gold White Dial Globe Black Alligator Strap 86060/000R-9640 NLX0T7 42 mm 18K rose gold case. Automatic movement capable of indicating not only the full time zones, but also the partial ones, so as to reflect the exact temporal reality in the 37 time zones. Three dials display: a sapphire dial with a unique day/night shading; a metal dial with a “Lambert projector” type map; and a metal chapter ring. 40-hour power reserve, mechanical self-winding Calibre 2460WT drives displays of the hours, minutes, central seconds and World Time. It enables simultaneous read-off of the time in all regions of the world, along with the day/night indication provided by the central world map. The cities shown in black represent the full time zones, while the cities in red indicate half-hour or quarter-hour zones.