The Rolex Sky-Dweller White Gold Black Dial 42mm Ref. 326139-0003 showcases Rolex’s technical mastery with its sophisticated annual calendar and dual time zone functionality. Crafted in 18 ct white gold, the 42mm case is paired with a sleek black dial featuring bold Arabic numerals and a unique off-centre 24-hour disc for tracking a second time zone, complemented by straightforward apertures at each hour marker to indicate the month. Its signature fluted bezel not only stands out visually but also enables intuitive adjustment of the calendar and time settings through Rolex’s Ring Command system. The robust Calibre 9001 automatic movement provides a 72-hour power reserve and is officially certified as a chronometer for reliable precision. The watch is fitted with a black rubber strap secured by a white gold folding clasp for added security and comfort. With a water resistance of 100 meters, the Sky-Dweller offers advanced complication in a wearable, monochrome design introduced to the lineup in 2014.