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OYSTER PERPETUAL COSMOGRAPH DAYTONA
CASE
Type OYSTER (monobloc middle case, screw-down case back,
winding crown and chronograph pushers)
Diameter: 40 mm
Material: 18 ct EVEROSE gold, polished finish
Case back: Screw-down with Rolex fluting
Bezel: Monobloc black CERACHROM with engraved numerals filled with pink gold via magnetron cathode sputtering
Winding crown: Screw-down, TRIPLOCK triple waterproofness system, Shoulders to protect the crown
Crystal :Scratch-resistant sapphire
Waterproofness 100 metres (330 feet)
MOVEMENT
Calibre 4130, Manufacture Rolex Chronograph movement with column wheel and vertical clutch, Precision Officially certified Swiss chronometer
Functions ;
. Chronograph with accuracy to 1⁄8 th of a second, 30-minute and 12-hour totalizers
. Tachymetric scale on the bezel to measure speed
. Small seconds hand at 6 o’clock
. Stop-seconds for precise time setting
. Oscillator Frequency: 28,800 beats/hour (4 Hz)
. Non-magnetic blue PARACHROM hairspring
. Breguet overcoil
. Large balance wheel with variable inertia
. High-precision regulating via four gold MICROSTELL A nuts
. Traversing balance bridge
. Jewelling 44 rubies
Winding: Bidirectional self-winding via PERPETUAL rotor on ball bearings
Power reserve Approximately 72 hours
DIALS
Chocolate brown, totalizer borders in 18 ct pink gold
. Hour markers Gold Arabic numerals, black PVD; phosphorescent hour markers at 3, 6 and 9 o’clock
. Hands 18 ct pink gold, filled with phosphorescent material
Ivory coloured, snailed totalizers in 18 ct pink gold
. Hour markers 18 ct pink gold appliques, filled with phosphorescent material
. Hands 18 ct pink gold, filled with phosphorescent material
STRAP
Material Black Alligator mississippiensis leather
Clasp 18 ct EVEROSE gold OYSTERLOCK folding clasp with safety catch
REFERENCE (CASE – STRAP): 116515LN – BLACK ALLIGATOR LEATHER