Rolex is introducing a new version of its Oyster Perpetual Cosmograph Daytona in 904L steel, with a monobloc Cerachrom bezel, developed and patented by Rolex, in black ceramic. This latest evolution is a blend of high technology and sleek aesthetics, and pays tribute to the heritage of this legendary chronograph. The black bezel is reminiscent of the 1965 model that was fitted with a black Plexiglas bezel insert. The new Cosmograph Daytona carries the Superlative Chronometer certification redefined by Rolex in 2015, which ensures singular performance on the wrist.

Created by Rolex in 1963, the Oyster Perpetual Cosmograph Daytona is a watch born to race. It has established an extraordinary track record in the world of motor sport thanks to its reliability and performance. Known simply as the “Daytona”, the watch has risen to the rank of an icon as one of the best known chronographs in the world. A key part of the model’s identity is the bezel engraved with a tachymetric scale for measuring average speeds of up to 400 miles or kilometres per hour. The new monobloc Cerachrom bezel in high-tech ceramic offers a number of advantages: it is corrosion resistant, virtually scratch- proof and the colour is unaffected by UV rays. This extremely durable bezel also offers an exceptionally legible tachymetric scale, thanks to the deposition of a thin layer of platinum in the numerals and gradu- ations via a PVD (Physical Vapour Deposition) process. The monobloc Cerachrom bezel is made in a single piece and holds the crystal firmly in place on the middle case, ensuring waterproofness.

The Cosmograph Daytona’s Oyster case, guaranteed waterproof to a depth of 100 metres (330 feet), is a paragon of robustness, proportion and elegance. Its characteristically shaped middle case is crafted from a solid block of 904L steel. The fluted case back 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 – as well as the chronograph pushers screw down securely against the case. Its crown guard is an integral part of the middle case. 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 manufac- tured by Rolex. Its architecture, a composite of Rolex technology, was completely re-engineered: the number of components for the chronograph function was reduced significantly, thereby enhancing its reliability. The robust chronograph is engaged by a mechanism with a column wheel and vertical clutch, allowing an instantaneous and extremely precise start. The oscillator, the true heart of the watch, has a blue Parachrom hairspring patented and manufactured by Rolex in an exclusive 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. It is equipped with a Rolex overcoil, ensuring its regularity in any position. Calibre 4130 is equipped with a self-winding module featuring a Perpetual rotor and boasts a power reserve of approximately 72 hours.

The new Cosmograph Daytona is available on a solid-link Oyster bracelet in 904L steel, with an Oysterlock safety clasp that prevents accidental opening. It features the ingenious Rolex-patented Easylink rapid extension system that allows the wearer to easily increase the bracelet length by approximately 5 mm, for additional comfort in any circumstance.

The Cosmograph Daytona is covered by the Superlative Chronometer certification redefined by Rolex in 2015. This exclusive designation testifies that the 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 its 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.

The precision of a Rolex Superlative Chronometer after casing is of the order of −2/+2 seconds per day.

Case	:	Oyster type (monobloc middle case, screw-down case back, winding crown and chronograph pushers)
Diameter	:	40 mm
Matérial	:	904L steel, polished finish
Bezel	:	Black monobloc Cerachrom in ceramic with an engraved tachymetric scale Numerals and graduations coated with platinum via magnetron sputtering
Case back	:	Screw-down with Rolex fluting
Winding crown	:	Screw-down Triplock triple waterproofness system
Crown guard	:	Integral part of the middle case
Crystal	:	Scratch-resistant sapphire
Waterproofness	:	100 metres (330 feet)
Muvement	:	Calibre 4130, Manufacture Rolex Mechanical chronograph movement with column wheel and vertical clutch Bidirectional self-winding via Perpetual rotor on ball bearing
Precision	:	−2/+2 sec/day, after casing
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 precise time setting
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/td>
Jewelling	:	44 rubies
Power reserve	:	Approximately 72 hours
Dial	:	White lacquer, black snailed counters
Hour markers	:	18 ct white gold appliques, Chromalight
Hands	:	18 ct white gold, Chromalight
Bracelet	:	Oyster type, three-piece solid links
Material	:	904L steel, polished centre links, satin-finished outer links with polished edges
Clasp	:	Oysterlock folding safety clasp Easylink 5 mm comfort extension link

Case	:	Oyster type (monobloc middle case, screw-down case back, winding crown and chronograph pushers)
Diameter	:	40 mm
Matérial	:	904L steel, polished finish
Bezel	:	Black monobloc Cerachrom in ceramic with an engraved tachymetric scale Numerals and graduations coated with platinum via magnetron sputtering
Case back	:	Screw-down with Rolex fluting
Winding crown	:	Screw-down Triplock triple waterproofness system
Crown guard	:	Integral part of the middle case
Crystal	:	Scratch-resistant sapphire
Waterproofness	:	100 metres (330 feet)
Muvement	:	Calibre 4130, Manufacture Rolex Mechanical chronograph movement with column wheel and vertical clutch Bidirectional self-winding via Perpetual rotor on ball bearing
Precision	:	−2/+2 sec/day, after casing
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 precise time setting
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/td>
Jewelling	:	44 rubies
Power reserve	:	Approximately 72 hours
Dial	:	Black lacquer, grey snailed counters
Hour markers	:	18 ct white gold appliques, Chromalight
Hands	:	18 ct white gold, Chromalight
Bracelet	:	Oyster type, three-piece solid links
Material	:	904L steel, polished centre links, satin-finished outer links with polished edges
Clasp	:	Oysterlock folding safety clasp Easylink 5 mm comfort extension link