Rolex - Yacht-Master Yacht-Master II

The Yacht-Master II is designed to meet the needs of professional sailors. This regatta chronograph features the world's first programmable countdown with a mechanical memory. It provides precise synchronization with the crucial starting sequence of a yacht race.  Movement Winding Mechanical Bidirectional, automatic Functions Calibre Centre hour and minute hands, small seconds hand at 6 o'clock. Programmable countdown with mechanical memory and on-the-fly synchronization. Stop-seconds for precise time setting 4161 Calibre, Manufactured by Rolex Water-Resistance Oyster Architecture Waterproof to 100 metres / 330 feet Monobloc middle case, screw-down case back and winding crown