ROLEX DAY-DATE40-m228348rbr-0039

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.

• 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)