-
Blue
# m136668lb-0001-0000
Model case
Oyster, 44 mm, yellow gold
Material
18 ct yellow gold
Winding crown
Screw-down, Triplock triple waterproofness system
Oyster architecture
Monobloc middle case, screw-down case back and winding crown
Bezel
Cerachrom Unidirectional rotatable 60-minute graduated, scratch-resistant Cerachrom insert in blue ceramic, numerals and graduations coated in gold
Crystal
Domed, 5.5 mm-thick scratch-resistant sapphire
Diameter
44mm
Water resistance
Waterproof to 100 metres / 330 feet
Movement
Perpetual, mechanical chronograph, self-winding
Functions
Centre hour and minute hands, small seconds hand at 6 o'clock. Chronograph via centre seconds hand, 30-minute counter at 3 o'clock and 12-hour counter at 9 o'clock. Stop seconds for exact time setting
Oscillator
Paramagnetic blue Parachrom hairspring. High-performance Paraflex shock absorbers
Calibre
4131, manufacture Rolex
Winding
Bidirectional self-winding via Perpetual rotor
Precision
-2/+2 sec/day, after casing
Power reserve
Approximately 72 hours
Bracelet
Oyster, three-piece solid links
Material
18 ct yellow gold
Dial
Blue
Details
Highly legible Chromalight display with long-lasting blue luminescence
Certification
Superlative Chronometer (COSC + Rolex certification after casing)