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Product Code: LKRO014

Regular Price: र92,995

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The COSMOGRAPH DAYTONA’s 40 mm OYSTER case, guaranteed waterproof to a depth of 100 metres (330 feet), is a paragon of proportion and elegance. The characteristically shaped middle case is crafted from a solid block of 18 ct gold. The fluted case back is hermetically screwed down with a special tool exclusive to Rolex watchmakers. The winding crown, fitted with the patented TRIPLOCK triple waterproofness system, as well as the chronograph pushers screw down securely against the case. It is protected by a crown guard that is an integral part of the middle case. The crystal is made of virtually scratchproof synthetic sapphire. The waterproof OYSTER case ensures optimal protection for the COSMOGRAPH DAYTONA’s high-precision movement Calibre 4130.

The COSMOGRAPH DAYTONA is equipped with calibre 4130, a self-winding mechanical chronograph movement entirely developed and manufactured. Like all PERPETUAL movements, the 4130 is a certified Swiss chronometer, a designation reserved for high-precision watches that have successfully passed the Swiss Official Chronometer Testing Institute (COSC) tests. Its architecture, like that of all OYSTER watch movements, makes it singularly precise and reliable. 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 when exposed to temperature variations and remains up to 10 times more precise than a traditional hairspring in case of shocks.

Technical details
Model: Oyster Perpetual COSMOGRAPH DAYTONA

Type: OYSTER (monobloc middle case, screw-down case back, winding crown and chronograph pushers)
Diameter: 40 mm
Material: 18 ct yellow gold, polished finish, lugs and crown guard set respectively with 36 and 20 brilliant-cut diamonds
Case back: Screw-down with Rolex fluting
Bezel: Set with a rainbow of 36 baguette-cut sapphires
W inding crown: Screw-down, TRIPLOCK triple waterproofness system
Crown guard:  Integral part of the middle case
Crystal: Scratch-resistant synthetic sapphire
W aterproofness:  100 metres (330 feet)

Calibre 4130, Manufacture Rolex
Mechanical chronograph movement with column wheel and vertical clutch
Bidirectional self-winding via PERPETUAL rotor on ball bearing
Precision: Officially certified Swiss chronometer .

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

Frequency: 28,800 beats/hour (4 Hz)
Paramagnetic blue PARACHROM hairspring
Breguet overcoil
Large balance wheel with variable inertia
High-precision regulating via four gold MICROSTELLA nuts
Traversing balance bridge
Jewelling: 44 rubies
Power reserve: Approximately 72 hours

Colour:  Black lacquer
Counters:  Yellow GOLD CRYSTALS (18 ct gold plating)
Hour markers:  8 diamonds in 18 ct yellow gold settings, numerals 15, 30 and 45 in 18 ct yellow gold
Hands:  Red chronograph hands

Type: OYSTER, three-piece solid links
Material: 18 ct yellow gold, polished centre links, satin-finished outer links with polished edges
Clasp:  Folding OYSTERLOCK safety clasp, EASYLINK 5 mm comfort extension link

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