Rolex Day-Date 40

Description

Ideal accomplishments

The Oyster Perpetual Day-Date 40 in 18 kt Everose gold with a chocolate dial, fluted bezel and a President bracelet.228235

Fluted bezel
A Rolex signature
The Rolex fluted bezel is a mark of distinction. Originally, the fluting of the Oyster bezel had a functional purpose: it served to screw the bezel onto the case helping to ensure the waterproofness of the watch.

It was therefore identical to the fluting on the case back, which was also screwed onto the case for waterproofness, using specific Rolex tools. Over time, the fluting became an aesthetic element, a genuine Rolex signature feature. Today the fluted bezel is a mark of distinction, in gold on this Day-Date 40.

Chocolate Dial
A watchmaking technique
The sunray finish creates delicate light reflections on many dials in the Oyster Perpetual collection. It is obtained using masterful brushing techniques that create grooves running outwards from the centre of the dial.

Light is diffused consistently along each engraving, creating a characteristic subtle glow that moves depending on the position of the wrist. Once the sunray finish has been completed, the dial colour is applied using Physical Vapour Deposition or electroplating. A light coat of varnish gives the dial its final look.

18 kt Everose gold
An exclusive patent
To preserve the beauty of its pink gold watches, Rolex created and patented an exclusive 18 kt pink gold alloy cast in its own foundry: Everose gold.

Introduced in 2005, 18 kt Everose is used on all Rolex Oyster models in pink gold.

The President bracelet
The ultimate refinement
The design, development and production of Rolex bracelets and clasps, as well as the stringent tests they face, involve advanced high technology.

And, as with all the components of the watch, aesthetic controls by the human eye guarantee impeccable beauty. The President bracelet, with its semi-circular three piece links, was created in 1956 for the launch of the Oyster Perpetual Day-Date. It represents the ultimate in refinement and comfort and is always made of carefully selected precious metals.

Model case
Oyster, 40 mm, Everose gold

Oyster architecture
Monobloc middle case, screw-down case back and winding crown

Diameter
40 mm

Material
18 kt Everose gold

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
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

Clasp
Concealed folding Crownclasp

Dial
Chocolate