18ct White Gold Rolex Oyster Perpetual Sky-Dweller Ref 326139. Case diameter 42mm. Water resistant to 100m / 330ft. Automatic chronometer Rolex 9001 calibre movement, 28,800, 40 jewels and a power reserve of 72 hours. Paramagnetic Blue Parachrom hairspring and high performance Paraflex shock absorbers. Black dial with arabic numeral hour markers, 12 apertures around the edge of the dial to indicate the month, centre disk indicates 24 hour display and date at 3 o’clock. Functions: Saros system Annual Calendar, GMT, Month, date, hours, minutes, seconds. Fluted bi-directional Ring Command bezel. Black alligator strap with 18ct white gold clasp. Box and papers dated September 2015.