Rolex Yacht-Master 40 (Oyster Perpetual Date). Here are the main features of this model: Watch Features: Model Line: Rolex Yacht-Master Case Size: 40mm stainless steel (Oystersteel) Bezel: Bidirectional rotatable platinum bezel with raised numerals Dial: Sunburst blue dial with large luminescent hour markers Hands: Mercedes-style hands with Chromalight (blue glow in the dark) Crystal: Scratch-resistant sapphire with Cyclops lens over the date (at 3 o’clock) Bracelet: Oyster bracelet (three-piece solid links in stainless steel) Movement: Rolex Caliber 3235 automatic (self-winding mechanical movement) Power Reserve: ~70 hours Water Resistance: 100 meters (330 feet) Functions: Hours, minutes, seconds Date display Stop-seconds for precise time setting