Reference
136668LB
Model case
Oyster, 44 mm, yellow gold
Bezel
Unidirectional rotatable 60-minute graduated, scratch-resistant Cerachrom insert in blue ceramic, numerals and graduations coated in gold
Water resistance
Waterproof to 3,900 metres / 12,800 feet, helium escape valve
Movement
Perpetual, mechanical, self-winding
Calibre
3235, Manufacture Rolex
Power reserve
Approximately 70 hours
Bracelet
Oyster, three-piece solid links
Dial
Blue
Certification
Superlative Chronometer (official chronometer certification + Rolex certification after casing)