Rolex Oyster Perpetual Datejust 31 New Versions in White, Yellow or Everose Gold
Rolex is introducing the new generation of popular Oyster Perpetual Datejust 31 series. Fitted with redesigned case sides and lugs and presented in 18 ct white, yellow or Everose gold, the new versions are equipped with calibre 2236.
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 (reference 278289 RBR-0005).
Another, in 18 ct yellow gold, features a malachite dial with a Roman VI and IX in 18 ct yellow gold set with diamonds (reference 278288 RBR-0004), and a version in 18 ct Everose gold is introduced with a diamond-paved dial inlaid with pink mother-of-pearl butterflies (reference 278285 RBR-0010).
The Oyster case of the Datejust 31 is guaranteed waterproof to a depth of 100 metres (330 feet).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 hermetically 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 scratch-proof sapphire. The waterproof Oyster case provides optimum protection for the Datejust 31’s high-precision movement.
The new Datejust 31 is equipped with caliber 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 superlative level of chronometric performance.
Insensitive to magnetic fields, the Syloxi hairspring provides great stability in the face of temperature variations and remains up to 10 times more precise than a traditional hairspring in case of shocks. Its patented 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 caliber equips the Datejust 31 for the first time.
The new Datejust 31 watches are fitted on a President bracelet, which benefits from a concealed attachment system, ensuring seamless visual continuity between the bracelet and case. The bracelet also includes ceramic inserts inside the links to enhance its flexibility and longevity, and has a concealed folding Crown clasp.
Like all Rolex watches, the Datejust 31 is covered by the Superlative Chronometer certification redefined by Rolex in 2015.
Technical details
Movement
Calibre 2236, Manufacture Rolex
Mechanical movement with bidirectional self-winding via Perpetual rotor
Precision: −2/+2 sec/day, after casing
Jewelling: 31 rubies
Power reserve: Approximately 55 hours
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
Certification
Superlative Chronometer certification
Model: Rolex Oyster Perpetual Datejust 31 in white gold with white mother-of-pearl dial, Reference 278289 RBR-0005
Case reference 278289 RBR | Bracelet reference 83369
Case
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)
Dial
White mother-of-pearl
Hour markers: 10 diamonds in 18 ct white gold settings
Hands: 18 ct white gold
Bracelet
President, three-piece solid links
18 ct white gold, polished centre links, satin-finished outer links with polished edges, ceramic inserts
Concealed folding Crown-clasp
Model: Rolex Oyster Perpetual Datejust 31 in yellow gold with malachite dial, Reference 278288 RBR-0004
Case reference 278288 RBR | Bracelet reference 83368
Case: 18 ct yellow gold
Middle case: 18 ct yellow gold, polished finish
Bezel: 18 ct yellow gold, set with 46 brilliant-cut diamonds
Dial: Malachite
Hour markers: Roman VI and IX in 18 ct yellow gold, set with 24 diamonds
Hands: 18 ct yellow gold
Bracelet: President, three-piece solid links; 18 ct yellow gold, polished centre links, satin-finished outer links with polished edges, ceramic inserts
Concealed folding Crownclasp
Model: Rolex Oyster Perpetual Datejust 31 in 18 ct Everose gold with paved, mother-of-pearl butterfly dial, Reference 278285 RBR-0010
Case reference 278285 RBR | Bracelet reference 83365
Case: 18 ct Everose gold
Middle case: 18 ct Everose gold, polished finish
Bezel: 18 ct Everose gold, set with 46 brilliant-cut diamonds
Dial: 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: President, three-piece solid links; 18 ct Everose gold, polished centre links, satin-finished outer links with polished edges, ceramic inserts
Concealed folding Crown clasp
