这是附加信息
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Model case
Oyster, 40 mm, yellow gold
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Oyster architecture
Monobloc middle case, screw-down case back and winding crown
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Diameter
40 mm
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Material
18 ct yellow gold
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Bezel
Black monobloc Cerachrom bezel in ceramic with moulded tachymetric scale
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Winding crown
Screw-down, Triplock triple waterproofness system
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Crystal
Scratch-resistant sapphire
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Water resistance
Waterproof to 100 metres / 330 feet
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Movement
Perpetual, mechanical chronograph, self-winding
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Calibre
4131, manufacture Rolex
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Precision
-2/+2 sec/day, after casing
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Oscillator
Paramagnetic blue Parachrom hairspring. High-performance Paraflex shock absorbers
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Winding
Bidirectional self-winding via Perpetual rotor
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Power reserve
Approximately 72 hours
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