Lady-Datejust – M279178-0030

Reference

Model case

Bezel

Water-resistance

Movement

Calibre

Power reserve

Bracelet

Dial

Certification

Superlative Chronometer (COSC + Rolex certification after casing)

White dial

Lacquer combines almost limitless freedom of colour with intensity and a smooth
finish. The lacquering technique consists of successively depositing six thin layers
of lacquer on a brass base plate. A colourless varnish is then applied to give the
colour or shade all of its depth and shine. Once the varnish is dry, the surface of the
dial is polished to magnify the colour; the dial is then ready to be pad printed and
receive its appliques.

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 Lady-Datejust.

18 ct yellow 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.