Rolex Datejust 31 Black Diamond Dial Automatic Ladies Watch 178383BKDJ. Stainless steel case with a stainless steel Rolex jubilee bracelet with 18kt yellow gold center links. Fixed 18kt yellow gold diamond-set bezel. Black dial with yellow gold-tone hands and diamond hour markers. Automatic movement. Scratch resistant sapphire crystal. Screw down crown. Solid case back. Case size: 31 mm. Round case shape. Concealed crown clasp. Water resistant at 100 meters / 330 feet. Functions: date, hour, minute, second..