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Rolex Baselworld 2018 | pressroom.rolex.com 2
Rolex is introducing the new generation of the Oyster Perpetual Datejust 31, with redesigned case sides and lugs. In 18 ct white, yellow or Everose gold, the new versions are equipped with calibre 2236, at the forefront of watchmaking technology.
Amongst the many combinations available, one, in 18 ct white gold, is fitted with a white mother-of-pearl dial and a diamond-set bezel. Another, in 18 ct yellow gold, features a malachite dial with a Roman VI and IX in 18 ct yellow gold set with diamonds, and a version in 18 ct Everose gold is introduced with a diamond-paved dial inlaid with pink mother-of-pearl butterflies.
Like all Rolex watches, the new-generation Datejust 31 carries the Superlative Chronometer certification, which ensures excellent performance on the wrist.
A N I C O N I C W A T C H
OYSTER PERPETUAL DATEJUST 31
Rolex Baselworld 2018 | pressroom.rolex.com 3
OYSTER PERPETUAL DATEJUST 31
Rolex’s Datejust is the archetype of the classic watch thanks to functions and aesthetics that never go out of fashion. Launched in 1945, it was the first self-winding waterproof chronom-eter wristwatch to display the date in a window at 3 o’clock on the dial, and consolidated all the major innovations that Rolex had contributed to the modern wristwatch until then. Aesthetically, the Datejust has spanned eras while retaining the enduring codes that today still make it one of the most recognizable of watches.
T I M E L E S S
S T Y L E
Rolex Baselworld 2018 | pressroom.rolex.com 4
The Oyster case of the Datejust 31, guaranteed waterproof to a depth of 100 metres (330 feet), is a paragon of robustness and elegance. Its refined middle case is crafted from a solid block of 18 ct yellow, white or Everose gold. The case back, edged with fine fluting, is her-metically screwed down with a special tool that allows only Rolex watchmakers to access the
movement. The winding crown, fitted with the Twinlock double waterproofness system, screws down securely against the case. The crystal, with a Cyclops lens at 3 o’clock for easy reading of the date, is made of virtually scratchproof sapphire. The waterproof Oyster case provides optimum protection for the Datejust 31’s high-precision movement.
T H E O Y S T E R C A S E ,
S Y M B O L O F W A T E R P R O O F N E S S
OYSTER PERPETUAL DATEJUST 31
Rolex Baselworld 2018 | pressroom.rolex.com 5
The new Datejust 31 is equipped with calibre 2236, a new-generation self-winding mechanical movement entirely developed and manufactured by Rolex. Fitted with a Syloxi hairspring in silicon, patented by Rolex, calibre 2236 offers a superla-tive level of chronometric performance. Insensitive to magnetic fields, the Syloxi hairspring provides great stability in the face of temperature vari ations
and remains up to 10 times more precise than a traditional hairspring in case of shocks. Its pat-ented geometry ensures its regularity in any position.
Calibre 2236 is equipped with a self-winding module via a Perpetual rotor and offers a power reserve of approximately 55 hours. This calibre equips the Datejust 31 for the first time.
OYSTER PERPETUAL DATEJUST 31
P E R P E T U A L C A L I B R E
2 2 3 6
Oscillator with Syloxi hairspring
Barrel Paramagnetic escape wheel
Setting crown with Paraflex
shock absorber
Rolex Baselworld 2018 | pressroom.rolex.com 6
The new Datejust 31 watches are fitted on a President bracelet, which benefits from a con-cealed attachment system, ensuring seamless visual continuity between the bracelet and case. The bracelet also includes ceramic inserts inside the links to enhance its flexi bility and longevity, and has a concealed folding Crownclasp.
OYSTER PERPETUAL DATEJUST 31
P R E S I D E N T
B R A C E L E T
Like all Rolex watches, the Datejust 31 is covered by the Superlative Chronometer certification re defined by Rolex in 2015. This exclusive desig-nation 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.
S U P E R L A T I V E
C H R O N O M E T E R
C E R T I F I C A T I O N
Rolex Baselworld 2018 | pressroom.rolex.com 7
*COSC + Rolex certification after casing
OYSTER PERPETUAL
D A T E J U S T 3 1Case reference 278289 RBR | Bracelet reference 83369
Category: Oyster Perpetual Classic
Superlative Chronometer certification*
Case
TYPE• Oyster (monobloc middle case,
screw-down case back and winding crown)
DIAMETER• 31 mm
MATERIAL• 18 ct white gold
MIDDLE CASE• 18 ct white gold, polished finish
BEZEL• 18 ct white gold, set with
46 brilliant-cut diamonds
CASE BACK• Solid, screw-down
with fine fluting
WINDING CROWN• Screw-down, Twinlock double
waterproofness system
CRYSTAL• Scratch-resistant sapphire• Cyclops lens over the date
with double anti-reflective coating
WATERPROOFNESS• 100 metres (330 feet)
Movement
CALIBRE • 2236, Manufacture Rolex• Mechanical movement
with bidirectional self-winding via Perpetual rotor
PRECISION• −2 /+2 sec/day, after casing
FUNCTIONS• Centre hour, minute
and seconds hands• Instantaneous date at 3 o’clock
with secure rapid-setting• Stop-seconds for exact time setting
OSCILLATOR• Frequency: 28,800 beats/hour (4 Hz)• Syloxi hairspring in silicon
with patented geometry• Paramagnetic nickel-phosphorus
escape wheel• Balance wheel with variable inertia• High-precision regulating
via two gold Microstella nuts• Traversing balance bridge• High-performance Paraflex
shock absorbers
JEWELLING• 31 rubies
POWER RESERVE• Approximately 55 hours
Dial
MATERIAL • White mother-of-pearl
HOUR MARKERS• 10 diamonds in 18 ct white gold
settings
HANDS• 18 ct white gold
Bracelet
TYPE• President, three-piece solid links
MATERIAL• 18 ct white gold, polished centre
links, satin-finished outer links with polished edges, ceramic inserts
CLASP• Concealed folding Crownclasp
Rolex Baselworld 2018 | pressroom.rolex.com 8
*COSC + Rolex certification after casing
OYSTER PERPETUAL
D A T E J U S T 3 1Case reference 278288 RBR | Bracelet reference 83368
Category: Oyster Perpetual Classic
Superlative Chronometer certification*
Case
TYPE• Oyster (monobloc middle case,
screw-down case back and winding crown)
DIAMETER• 31 mm
MATERIAL• 18 ct yellow gold
MIDDLE CASE• 18 ct yellow gold, polished finish
BEZEL• 18 ct yellow gold, set with
46 brilliant-cut diamonds
CASE BACK• Solid, screw-down
with fine fluting
WINDING CROWN• Screw-down, Twinlock double
waterproofness system
CRYSTAL• Scratch-resistant sapphire• Cyclops lens over the date
with double anti-reflective coating
WATERPROOFNESS• 100 metres (330 feet)
Movement
CALIBRE • 2236, Manufacture Rolex• Mechanical movement
with bidirectional self-winding via Perpetual rotor
PRECISION• −2 /+2 sec/day, after casing
FUNCTIONS• Centre hour, minute
and seconds hands• Instantaneous date at 3 o’clock
with secure rapid-setting• Stop-seconds for exact time setting
OSCILLATOR• Frequency: 28,800 beats/hour (4 Hz)• Syloxi hairspring in silicon
with patented geometry• Paramagnetic nickel-phosphorus
escape wheel• Balance wheel with variable inertia• High-precision regulating
via two gold Microstella nuts• Traversing balance bridge• High-performance Paraflex
shock absorbers
JEWELLING• 31 rubies
POWER RESERVE• Approximately 55 hours
Dial
MATERIAL • Malachite
HOUR MARKERS• Roman VI and IX in 18 ct yellow gold,
set with 24 diamonds
HANDS• 18 ct yellow gold
Bracelet
TYPE• President, three-piece solid links
MATERIAL• 18 ct yellow gold, polished centre
links, satin-finished outer links with polished edges, ceramic inserts
CLASP• Concealed folding Crownclasp
Rolex Baselworld 2018 | pressroom.rolex.com 9
*COSC + Rolex certification after casing
OYSTER PERPETUAL
D A T E J U S T 3 1Case reference 278285 RBR | Bracelet reference 83365
Category: Oyster Perpetual Classic
Superlative Chronometer certification*
CASE
TYPE• Oyster (monobloc middle case,
screw-down case back and winding crown)
DIAMETER• 31 mm
MATERIAL• 18 ct Everose gold
MIDDLE CASE• 18 ct Everose gold, polished finish
BEZEL• 18 ct Everose gold, set with
46 brilliant-cut diamonds
CASE BACK• Solid, screw-down
with fine fluting
WINDING CROWN• Screw-down, Twinlock double
waterproofness system
CRYSTAL• Scratch-resistant sapphire• Cyclops lens over the date
with double anti-reflective coating
WATERPROOFNESS• 100 metres (330 feet)
Movement
CALIBRE • 2236, Manufacture Rolex• Mechanical movement
with bidirectional self-winding via Perpetual rotor
PRECISION• −2 /+2 sec/day, after casing
FUNCTIONS• Centre hour, minute
and seconds hands• Instantaneous date at 3 o’clock
with secure rapid-setting• Stop-seconds for exact time setting
OSCILLATOR• Frequency: 28,800 beats/hour (4 Hz)• Syloxi hairspring in silicon
with patented geometry• Paramagnetic nickel-phosphorus
escape wheel• Balance wheel with variable inertia• High-precision regulating
via two gold Microstella nuts• Traversing balance bridge• High-performance Paraflex
shock absorbers
JEWELLING• 31 rubies
POWER RESERVE• Approximately 55 hours
Dial
MATERIAL • Paved, mother-of-pearl butterfly dial • 18 ct pink gold, set with
262 diamonds and inlaid with pink mother-of-pearl butterflies
HANDS• 18 ct pink gold
Bracelet
TYPE• President, three-piece solid links
MATERIAL• 18 ct Everose gold, polished centre
links, satin-finished outer links with polished edges, ceramic inserts
CLASP• Concealed folding Crownclasp