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Technical Specifications - Oyster Perpetual Yacht-Master 42
Case reference: 226658
Bracelet: Oysterflex
Category: Oyster Perpetual Professional
Certification: Superlative Chronometer (COSC + Rolex certification after casing)
International five-year guarantee
Case:
• Oyster (monobloc middle case, screw-down case back and winding crown)
Safety
• Integral crown guard
Diameter
• 42 mm
Material
• 18 ct yellow gold
Middle case
• 18 ct yellow gold, polished finish
Bezel
• 18 ct yellow gold, bidirectional rotatable
• 60-minute graduated monobloc Cerachrom insert in matt black ceramic; polished, raised graduations and numerals, first 15 minutes graduated minute-by-minute
Case back
• 18 ct yellow gold, solid, screw-down with fine fluting
Winding crown
• Triplock in 18 ct yellow gold, screw-down, triple waterproofness system
Crystal
• Scratch-resistant sapphire with anti-reflective coating
• Cyclops lens over the date with double anti-reflective coating
Waterproofness
• 100 metres (330 feet)
Movement:
• Calibre 3235, Manufacture Rolex
• Mechanical movement with bidirectional self-winding via Perpetual rotor
Precision
• −2 /+2 sec./day, after casing
Functions
• Centre hour, minute and seconds hands
• Instantaneous date at 3 o’clock with secure rapid-setting
• Stop-seconds for exact time setting
Oscillator
• Frequency: 28,800 beats/hour (4 Hz)
• Paramagnetic blue Parachrom hairspring
• Rolex overcoil
• Large balance wheel with variable inertia
• High-precision regulating via four gold
Microstella nuts
• Traversing balance bridge
• High-performance Paraflex shock absorbers
Escapement
• Chronergy with optimized energy efficiency
• Paramagnetic nickel-phosphorus pallet fork and escape wheel
Jewelling
• 31 rubies
Power reserve
• Approximately 70 hours
Dial:
• Black lacquer
• Hour markers in 18 ct yellow gold, highly legible Chromalight (long-lasting luminescence, blue glow)
• Hands in 18 ct yellow gold, highly legible Chromalight (long-lasting luminescence, blue glow)
Bracelet:
• Oysterflex
• Flexible metal blades overmoulded with high-performance elastomer
• Oysterlock folding safety clasp in 18 ct yellow gold
• Rolex Glidelock extension system (approx. 15 mm in increments of approx. 2.5 mm)
