
Day-Date 40Oyster, 40 mm, platinum
The Oyster Perpetual Day-Date 40 in Platinum with a bright black dial, Fluted bezel and a President bracelet.
The Day-Date was the first watch to indicate the day of the week spelt out in full when it was first presented in 1956.


Bright black dial
A distinctive face
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 gold to prevent tarnishing, every Rolex dial is designed and manufactured in-house, largely by hand to ensure perfection.
Model features
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The Fluted Bezel A Rolex signature -
Platinum The noblest of metals -
The President bracelet The ultimate refinement -
Day Display Instantaneous at midnight -
The Cyclops lens A magnifying lens -
3255 Movement Superlative performance
More Day-Date
Technical Details
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Reference 228236
Model Case
- Model Case
- Oyster, 40 mm, platinum
- Oyster Architecture
- Monobloc middle case, screw-down case back and winding crown
- Diameter
- 40 mm
- Material
- Platinum
- Bezel
- Fluted
- 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
- 3255, Manufacture Rolex
- Precision
- -2/+2 sec/day, after casing
- Functions
- Centre hour, minute and seconds hands. Instantaneous day and date in apertures, unrestricted rapid-setting. Stop-seconds for precise time setting
- Oscillator
- Paramagnetic blue Parachrom hairspring. High-performance Paraflex shock absorbers
- Winding
- Bidirectional self-winding via Perpetual rotor
- Power reserve
- Approximately 70 hours
Bracelet
- Bracelet
- President, semi-circular three-piece links
- Bracelet Material
- Platinum
- Clasp
- Concealed folding Crownclasp
Dial
- Dial
- Bright black
Certification
- Certification
- Superlative Chronometer (COSC + Rolex certification after casing)
How to Set your
Day-Date 40
Synonymous with excellence and reliability, Rolex watches are designed for everyday wear, and depending on the model, perfectly suited for a wide range of sports and other activities. Built to last, these timepieces are characterized by their distinctive and timeless aesthetics. The Oyster Perpetual Day-Date 40 is the ultimate watch of prestige. Learn more about this model and how to set the time, date and day by watching the video.