Rolex Air King

Rolex Air King

CATEGORYOyster Perpetual Professional
CertificationSuperlative Chronometer (COSC + Rolex certification after casing
Case
TypeOyster (monobloc middle case, screw-down case back and winding crown
SafetyInternal magnetic shield to protect the movement
Diameter40mm
MaterialOystersteel
Middle CaseOystersteel, satin finish wiht polished sides
BezelOystersteel, smooth
Case backSolid, screw-down with fine fluting
Winding CrownScrew-down; Twinlock double waterproofness system
CrystalScratch-resistant sapphire
Waterproofness100 metres (330 feet)
Movement
Calibre3131, Manufacture Rolex
Mechanical movement with bidirectional self-winding via Perpetual rotor
Precision-2/+2 sec./day, after casing
FunctionsCentre hour, minute and seconds hands
Stop-seconds for precise time setting
OscillatorFrequency: 28,800 beats/hour (4Hz)
Paramagnetic blue Parachrom hairspring
Rolex overcoil
Large balance wheel with variable inertia
Paramagnetic nickel-phosphorus escape wheel
High-precision regulating via four gold Microstella nuts
Traversing balance bridge
Jewelling31 rubies
Power ReserveApproximately 48 hours
Dial
ColourBlack, gloss finish
Hour Markers3,6,9 in 18 ct white gold, white transferred minutes numerals
Trinagle in 18 ct white gold at 12 o’clock, highly legible Chromalight (long lasting luminescence, blue glow
Hands18 ct white gold, green seconds hand, highly legible Chromalight (long last luminescence, blue glow
Bracelet
TypeOyster(three-piece solid links)
MaterialOystersteel, satin-finish with polished edges
ClaspFolding Oysterclasp
Easlylink 5mm comfort extension link

Featured image ©Rolex