Cartier’s newest triple complication, the Rotonde de Cartier Earth and Moon, made its global debut last month at the Salon Internationale de Haute Horlogerie. The watch’s vibrant lapis lazuli dial is overlaid with roman numerals in chamfered white gold, lending a three-dimensional appearance that has become a hallmark of Cartier’s fine watches. The first of the watch’s three complications, a 24-hour disk that can track a second time zone, is found at the top of the dial and can be set via a pusher positioned a…