Oyster, 41 mm, Oystersteel case. Monobloc middle case, screw-down case back and winding crown. Diameter: 41 mm. Material: Oystersteel. Bezel: Unidirectional rotatable 60-minute graduated, scratch-resistant Cerachrom insert in ceramic, numerals and graduations coated in platinum. Winding crown: Screw-down, Twinlock double waterproofness system. Crystal: Scratch-resistant sapphire, Cyclops lens over the date. Waterproof to 300 metres / 1,000 feet. Oyster, flat three-piece links bracelet. Material: Oystersteel. Clasp: Folding Oysterlock safety clasp with Rolex Glidelock extension system. Black dial. Highly legible Chromalight display with long-lasting blue luminescence.