Rolex Oyster Perpetual Cosmograph Daytona Everose Gold Gemset Version

During Baselworld 2018 watch exhibition, Rolex presented a sparkling gem-set version of the iconic Oyster Perpetual Cosmograph Daytona watch.

On this new 18 ct Everose gold version, in lieu of the emblematic tachymetric scale, the bezel is set with a gradation of sapphires in rainbow hues. The case is adorned with 56 brilliant-cut diamonds set into the lugs and crown guard, and the dial features 11 baguette-cut sapphire hour markers, each of which matches the colour of the corresponding point on the bezel. The chronograph counters are in pink Gold Crystals, a material with a particular shimmer effect, created during the crystallization of a pink gold alloy by means of a special process developed by Rolex.

The Cosmograph Daytona’s Oyster case, guaranteed waterproof to a depth of 100 metres
(330 feet), is a paragon of robustness and reliability. Its middle case, with an integral crown guard, is crafted from a solid block of 18 ct Everose gold. The case back, edged with fine fluting, is hermetically screwed down with a special tool that allows only Rolex watchmakers to access the movement. The winding crown, fitted with the Triplock triple waterproofness system, screws down securely against the case, along with the chronograph pushers. The crystal is made of virtually scratchproof sapphire. The waterproof Oyster case provides optimum protection for the Cosmograph Daytona’s high-precision movement.

The Cosmograph Daytona is equipped with calibre 4130, a self-winding mechanical chronograph movement entirely developed and manufactured by Rolex. A consummate demonstration of Rolex technology, the movement incorporates a chronograph function with a reduced number of components, thereby enhancing the movement’s reliability. The robust chronograph is engaged by a mechanism with a column wheel and vertical clutch, providing an instant and extremely precise start. The oscillator, the true heart of the watch, has a blue Parachrom hairspring manufactured by Rolex in an exclusive paramagnetic alloy.

Insensitive to magnetic fields, the Parachrom hairspring offers great stability in the face of temperature variations and remains up to 10 times more precise than a traditional hairspring in case of shocks. A Rolex overcoil ensures its regularity in any position. Calibre 4130 is equipped with a self-winding module via a Perpetual rotor and offers a power reserve of approximately 72 hours.

This new version of the Cosmograph Daytona is fitted on a solid-link Oyster bracelet in 18 ct Everose gold with ceramic inserts and an Oysterlock safety clasp to prevent accidental opening. The bracelet includes the Easylink rapid extension system, patented by Rolex in 1996, that allows the wearer to easily increase the bracelet length by approximately 5 mm for additional comfort.

Like all Rolex watches, the Cosmograph Daytona is covered by the Superlative Chronometer certification redefined by Rolex in 2015. This exclusive designation testifies that each watch has successfully undergone a series of tests conducted by Rolex in its own laboratories according to its own criteria, which exceed watchmaking norms and standards.

The certification applies to the fully assembled watch, after casing the movement, guaranteeing superlative performance on the wrist in terms of precision, power reserve, waterproofness and self-winding. The precision of a Rolex Superlative Chronometer after casing is of the order of −2 /+2 seconds per day, or more than twice that required of an official chronometer. The Superlative Chronometer status is symbolized by the green seal that comes with every Rolex watch and is coupled with an international five-year guarantee.

Technical details
Case reference 116595 RBOW | Bracelet reference 78595 A
Category: Oyster Perpetual Professional
Superlative Chronometer certification

Case
Oyster (monobloc middle case, screw-down case back, winding crown and pushers)
Crown guard forms integral part of middle case
Diameter: 40 mm
Material: 18 ct Everose gold
Middle case: 18 ct Everose gold, set with 56 brilliant-cut diamonds, polished sides
Bezel: 18 ct Everose gold, set with 36 baguette-cut sapphires in a rainbow gradation
Case Back: Solid, screw-down with fine fluting
Winding crown: Screw-down, Triplock triple waterproofness system
Crystal: Scratch-resistant sapphire
Waterproofness: 100 metres (330 feet)

Movement
Calibre 4130, Manufacture Rolex
Mechanical chronograph movement with column wheel and vertical clutch
Bidirectional self-winding via Perpetual rotor
Precision: −2/+2 sec/day, after casing
Jewelling: 44 rubies
Power reserve: Approximately 72 hours

Oscillator
• Frequency: 28,800 beats/hour (4 Hz)
• Paramagnetic blue Parachrom hairspring
• Rolex overcoil
• Large balance wheel with variable inertia
• High-precision regulating via four gold Microstella nuts
• Traversing balance bridge

Functions
Centre hour and minute hands, small seconds hand at 6 o’clock
Chronograph (centre hand) accurate to within 1/8 of a second
30-minute counter at 3 o’clock and 12-hour counter at 9 o’clock
Stop-seconds for exact time setting

Dial
Colour: Black lacquer, counters in 18 ct pink Gold Crystals
Hour markers: 11 baguette-cut, rainbow-coloured sapphires
Hands: 18 ct pink gold, highly legible Chromalight (long-lasting luminescence, blue glow), except on the centre seconds hand and counter hands

Bracelet
Type: Oyster, three-piece solid links
Material: 18 ct Everose gold, polished centre links, satin-finished outer links with polished edges, ceramic inserts
Oysterlock folding safety clasp
Easylink 5 mm comfort extension link

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