The Rolex Oyster Perpetual Sky-Dweller is the latest design featuring both a refined style and advanced function making it the most complicated Rolex watch to date. The 42 mm watch case is crafted in luxurious 18 kt. Everose gold housing the Rolex Calibre 9001 self-winding mechanical movement featuring dual time zones and an annual calendar, it is water resistant up to 100 meters/330 ft.