Datejust 31 – M278289RBR-0006

Reference

Model case

Bezel

Water-resistance

Movement

Calibre

Power reserve

Bracelet

Dial

Certification

Superlative Chronometer (COSC + Rolex certification after casing)

Dark Grey Dial

This dial features diamonds in 18 ct gold settings. 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.

Diamond-set bezel

Gem-setters, like sculptors, finely carve the precious metal to hand-shape the seat in
which each gemstone will be perfectly lodged. With the art and craft of a jeweller, the
stone is placed and meticulously aligned with the others, then firmly secured in its
gold or platinum setting. Besides the intrinsic quality of the stones, several other
criteria contribute to the beauty of Rolex gem-setting: the precise alignment of the
height of the gems, their orientation and position, the regularity, strength and
proportions of the setting as well as the intricate finishing of the metalwork. A
sparkling symphony to enhance the watch and enchant the wearer.

18 ct white gold

By operating its own exclusive foundry, Rolex has the unrivalled ability to cast the
highest quality 18 ct gold alloys. According to the proportion of silver, copper,
platinum or palladium added, different types of 18 ct gold are obtained: yellow,
pink or white. They are made with only the purest metals and meticulously inspected
in an in-house laboratory with state-of-the-art equipment, before the gold is formed
and shaped with the same painstaking attention to quality. Rolex's commitment to
excellence begins at the source.