YACHT-MASTER II TECHNICAL DETAILS

• MODEL CASE: Oyster, 44 mm, Oystersteel
• OYSTER ARCHITECTURE: Monobloc middle case, screw-down case back and winding crown
• DIAMETER: 44 mm
• MATERIAL: Oystersteel
• BEZEL: Bidirectional rotatable Ring Command bezel. Blue Cerachrom insert in ceramic, moulded numerals and inscription
• WINDING CROWN: Screw-down, Triplock triple waterproofness system
• CRYSTAL: Scratch-resistant sapphire
• WATER RESISTANCE: Waterproof to 100 metres / 330 feet

• MOVEMENT: Perpetual, mechanical, self-winding, regatta chronograph
• CALIBRE: 4161, Manufacture Rolex
• PRECISION: -2/+2 sec/day, after casing
• FUNCTIONS: 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
• OSCILLATOR: Paramagnetic blue Parachrom hairspring
• WINDING: Bidirectional self-winding via Perpetual rotor
• POWER RESERVE: Approximately 72 hours

• BRACELET: Oyster, flat three-piece links
• BRACELET MATERIAL: Oystersteel
• CLASP: Folding Oysterlock safety clasp with Easylink 5 mm comfort extension link