Rolex Sky-Dweller 42 mm White Dial — Key Specs (Reference 326238) Specification Details Model Name Rolex Sky-Dweller 42 mm (White Dial) Reference 326238-0006 / 326238* Case Diameter 42 mm Case Material 18 k Yellow Gold Bezel Rolex Ring Command Fluted Bezel in Yellow Gold Dial Color White with Index Hour Markers Crystal Scratch-resistant Sapphire with Cyclops Lens over Date Movement Rolex Calibre 9001 Automatic Self-Winding Functions Dual Time Zone (24 hr), Annual Calendar (Saros), Date, Month Power Reserve Approximately 72 hours Bracelet/Strap Black Oysterflex Rubber Strap with Yellow Gold Clasp Clasp Folding Oysterclasp with Rolex Glidelock Extension Water Resistance 100 m / 330 ft Certification Rolex Superlative Chronometer (-2/ 2 sec/day) Style Category Luxury Travel / Annual Calendar Watch