Rolex DateJust 41 mm Oyster Perpetual Steel and 18ct Everose Gold Slate Dial Highly legible Chromalight display with longlasting blue luminescence, Smooth Bezel, Perpetual, mechanical, self-winding Movement, Oyster, flat three-piece links Bracelet, Approximately 70 hours Power Reserve, Waterproof to 100 metres / 330 feet.