Rolex Oyster Perpetual Sky-Dweller 326933. Bi-metal 42mm case which is water resistant to 100m / 330ft. Automatic chronometer Rolex 9001 calibre movement, 28,800, 40 jewels and a power reserve of 72 hours. Paramagnetic Blue Paracrom hairspring and high performance Paraflex shock absorbers. Silver dial with 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. Bi-metal Oyster lock bracelet.