Lady-Datejust 28

datejust
Oyster, 28 mm, platinum
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Watch Features

The instantaneous date

Platinum

Rare and precious, platinum is striking for its silvery whiteness and vibrant luminosity. It is among the densest and heaviest metals in the world, distinguished by unique chemical and physical properties such as exceptional corrosion resistance. Paradoxically, it is also soft, elastic and highly malleable, which makes machining and polishing especially difficult, demanding an extremely high degree of skill. Rolex always uses 950 platinum, an alloy consisting of 950‰ (thousandths) platinum, painstakingly crafted in-house by the fine metalworkers at Rolex. The noblest of metals for the finest of watches.

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Dark Grey Dial

The dial is the distinctive face of a Rolex watch, the feature most responsible for its identity and readability. Characterised by hour markers fashioned from 18 ct gold to prevent tarnishing, every Rolex dial is designed and manufactured in-house, largely by hand to ensure perfection.

The President bracelet

This Lady-Datejust 28 is offered on a prestigious President bracelet. Always in solid gold or platinum, the bracelets benefit from a concealed attachment beneath the bezel which ensures seamless visual continuity between the bracelet and case. A new-generation concealed Crownclasp, opened with a hinged Rolex crown, adds the final aesthetic and functional touch to these sumptuous bracelets.

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2236 Movement

The calibre 2236 is a new-generation self-winding mechanical movement entirely developed and manufactured by Rolex. Fitted with a Syloxi hairspring in silicon, patented by Rolex, it offers a superlative level of chronometric performance. Insensitive to magnetic fields, the Syloxi hairspring provides great stability in the face of temperature variations and remains up to 10 times more precise than a traditional hairspring in case of shocks. Its patented geometry ensures its regularity in any position.

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The Cyclops Lens

The Cyclops lens enhances the date aperture, magnifying the date display for easy reading. It is one of the most distinctive Rolex features, and one of the most recognisable.

Specifications

Reference 279166
Model case
Model case
Oyster, 28 mm, platinum
Oyster architecture
Monobloc middle case, screw-down case back and winding crown
Diameter
28 mm
Material
Platinum
Bezel
Domed
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
Movement
Perpetual, mechanical, self-winding
Calibre
2236, Manufacture Rolex
Precision
-2/+2 sec/day, after casing
Functions
Centre hour, minute and seconds hands. Instantaneous date with rapid setting. Stop-seconds for precise time setting
Oscillator
Winding
Bidirectional self-winding via Perpetual rotor
Power reserve
Approximately 55 hours
Bracelet
Bracelet
President, semi-circular three-piece links
Bracelet material
Platinum
Clasp
Concealed folding Crownclasp
Dial
Dial
Dark grey set with diamonds
Gem-setting
Diamonds in 18 ct gold settings
Certification
Superlative Chronometer (COSC + Rolex certification after casing)