The Oyster Perpetual Day-Date 40 in 18 ct Everose gold, with an Eisenkiesel, 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
Oyster, 40 mm, Everose gold and diamonds
OYSTER ARCHITECTURE
Monobloc middle case, screw-down case back and winding crown
DIAMETER
40 mm
MATERIAL
18 ct Everose 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
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
President, semi-circular three-piece links
BRACELET MATERIAL
18 ct Everose gold
CLASP
Concealed folding Crownclasp
