18kt white gold case with a black (alligator) leather strap. Bi-directional rotating ring command 18kt white gold bezel. Black dial with luminous silver-tone hands and Arabic numeral hour markers. Minute markers around the outer rim. Dial Type: Analog. Luminescent hands. Date display at the 3 o'clock position. One subdial displaying: 24 hour. Rolex Calibre 9001 Automatic movement, containing 40 Jewels, composed of 380 parts, bitting at 28800 vph, and has a power reserve of approximately 72 hours. Scratch resistant sapphire crystal. Screw down crown. Solid case back. Round case shape, case size: 42 mm. Oyster clasp. Water resistant at 100 meters / 330 feet. Functions: annual calendar, GMT, second time zone, month, date, hour, minute, second, chronometer. Sky Dweller Series. Luxury watch style. Watch label: Swiss Made. Item Variations: 326139-STRAP. Rolex Sky-Dweller Automatic Black Dial 18kt White Gold Mens Watch 326139BKAL.