Used Rolex watch (like new) Oyster, 41 mm, Oystersteel Oyster architecture Monobloc middle case "Monobloc", case back and winding crown screwed down Diameter 41 mm Material Oystersteel Bezel Smooth Winding crown Twinlock winding crown with two seals waterproof, screwed down Crystal Scratch-resistant sapphire and cyclops lens for date magnification Water resistance Waterproof to 100 meters / 330 feet Movement Perpetual, mechanical, self-winding movement Calibre 3235, Manufacture Rolex Precision -/2+2 seconds per day, after casing Functions Centre hour, minute and second hands. Instantaneous date display with rapid setting. Stop-seconds function for precise time setting Oscillator Paramagnetic blue Parachrom hairspring. High-performance Paraflex shock absorbers Winding Bidirectional self-winding via Perpetual rotor Power reserve Approximately 70 hours Brand: Rolex