Reference

136668LB

Model case

Oyster, 44 mm, yellow gold

Water-resistance

Waterproof to 3,900 metres / 12,800 feet, helium escape valve

Bezel

Unidirectional rotatable 60-minute graduated, scratch-resistant Cerachrom insert in blue ceramic, numerals and graduations coated in gold

Dial

Blue

Bracelet

Oyster, three-piece solid links

Movement

Perpetual, mechanical, self-winding

Calibre

3235, Manufacture Rolex

Power reserve

Approximately 70 hours

Certification

Superlative Chronometer (COSC + Rolex certification after casing)