Day-Date 40Oyster, 40 mm, yellow gold and diamonds
The Oyster Perpetual Day-Date 40 in 18 ct yellow gold, with an onyx, diamond-set dial, diamond-set bezel and a President bracelet.
Its dial features 10 baguette-cut diamonds. 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.
Onyx 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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Diamond-Set Bezel A sparkling symphony -
18 ct yellow gold Commitment to excellence -
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 228398TBR
Model Case
- Model Case
- Oyster, 40 mm, yellow gold and diamonds
- Oyster Architecture
- Monobloc middle case, screw-down case back and winding crown
- Diameter
- 40 mm
- Material
- 18 ct yellow gold
- Bezel
- Set with diamonds
- 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
- 18 ct yellow gold
- Clasp
- Concealed folding Crownclasp
Dial
- Dial
- Onyx set with diamonds
- Gem setting
- 10 baguette-cut diamonds
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.
Contact an Official Rolex Retailer
The Rolex Collection features both Classic and Professional watches available in a variety of materials, dials, bracelets and sizes to suit all wrists and styles.
