Datejust 31

Reference

278240

Model case

Oyster, 31 mm, Oystersteel

Water-resistance

Waterproof to 100 metres / 330 feet

Bezel

Domed

Dial

Bright blue

Bracelet

Jubilee, five-piece links

Movement

Perpetual, mechanical, self-winding

Calibre

2236, Manufacture Rolex

Power reserve

Approximately 55 hours

Certification

Superlative Chronometer (COSC + Rolex certification after casing)