Rolex Datejust 31mm in Oystersteel features a silver dial

The sunray finish creates delicate light reflections on many dials in the Oyster Perpetual collection. It is obtained using masterful brushing techniques that create grooves running outwards from the centre of the dial.

Light is diffused consistently along each engraving, creating a characteristic subtle glow that moves depending on the position of the wrist. Once the sunray finish has been completed, the dial colour is applied using Physical Vapour Deposition or electroplating. A light coat of varnish gives the dial its final look.

Rolex uses Oystersteel for its steel watch cases. Specially developed by the brand, Oystersteel belongs to the 904L steel family, alloys most commonly used in high-technology and in the aerospace and chemical industries, where maximum resistance to corrosion is essential.

Oystersteel is extremely resistant, offers an exceptional finish once polished and maintains its beauty even in the harshest environments.

The Oyster bracelet is a perfect alchemy of form and function, aesthetics and technology, designed to be both robust and comfortable.

It is equipped with an Oysterclasp and the Easylink comfort extension link, also exclusive to Rolex. This ingenious system allows the wearer to increase the bracelet length by approximately 5 mm, providing additional comfort in any circumstance.

Model Case

Type

  • Oyster, 31 mm, Oystersteel

Diameter

  • 31 mm

Material

  • Oystersteel

Bezel

  • Domed

Oyster Architecture

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

Winding Crown

  • Screw-down, Twinlock double waterproofness system

Crystal

  • Scratch-resistant sapphire, Cyclops lens over the date

Water Resistance

  • Waterproof to 100 metres / 330 feet

Movement

Type

  • Perpetual, mechanical, self-winding

Calibre

  • 2236, Manufacture Rolex

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

Functions

Centre hour, minute and seconds hands. Instantaneous date with rapid setting. Stop-seconds for precise time setting

Power reserve

  • Approximately 55 hours

Bracelet

Type

  • Oyster, three-piece solid links

Bracelet Material

  • Oystersteel

Clasp

  • Folding Oysterclasp with Easylink 5 mm comfort extension link

Dial

Type

  • Silver

Certification

Superlative Chronometer (COSC + Rolex certification after casing)

Case reference 278240

Bracelet reference 72360