Datejust 31 – M278240-0005

Gender


Women

Model Size


31 mm

Material


Oystersteel

Dial


Silver

Collection


Datejust

Reference


278240

Bezel


Domed

Water-Resistance


Waterproof to 100 metres / 330 feet

Movement


mechanical, Perpetual, self-winding

Caliber


2236, Manufacture Rolex

Power Reserve


Approximately 55 hours

Bracelet


flat three-piece links, Oyster

Certification


Superlative Chronometer (COSC + Rolex certification after casing)

Simple Material


Oystersteel

Spec Oyster Architecture


Monobloc middle case, screw-down case back and winding crown

Winding Crown


Screw-down, Twinlock double waterproofness system

Crystal


Cyclops lens over the date, Scratch-resistant sapphire

Precision


-2/+2 sec/day, after casing

Oscillator


Syloxi hairspring in silicon with patented geometry. High-performance Paraflex shock absorbers

Winding


Bidirectional self-winding via Perpetual rotor

Clasp


Folding Oysterclasp with Easylink 5 mm comfort extension link

Details


Highly legible Chromalight display with long-lasting blue luminescence

Size


Small size

Dial Color


Light dial

Bracelet Material


Oystersteel

Background-color


Silver

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