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Rolex

Datejust 31

Oyster, 31 mm, yellow gold

M278278-0030

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M278278-0030-on-wrist

  • REFERENCE

    278278

  • MODEL CASE

    Oyster, 31 mm, yellow gold

  • BEZEL

    Fluted

  • WATER RESISTANCE

    Waterproof to 100 metres / 330 feet

  • MOVEMENT

    Perpetual, mechanical, self-winding

  • CALIBRE

    2236, Manufacture Rolex

  • POWER RESERVE

    Approximately 55 hours

  • BRACELET

    President, semi-circular three-piece links

  • DIAL

    Olive green set with diamonds

  • CERTIFICATION

    Superlative Chronometer (COSC + Rolex certification after casing)

Olive-Green Dial

Olive-Green Dial

This dial features a large VI set with 11 diamonds. 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.

Fluted bezel

Fluted bezel

The Rolex fluted bezel is a mark of distinction. Originally, the fluting of the Oyster bezel had a functional purpose: it served to screw the bezel onto the case helping to ensure the waterproofness of the watch. It was therefore identical to the fluting on the case back, which was also screwed onto the case for waterproofness, using specific Rolex tools. Over time, the fluting became an aesthetic element, a genuine Rolex signature feature. Today the fluted bezel is a mark of distinction, in gold on this Datejust 31.