Yacht-Master II

Yacht-Master II

CATEGORYOyster Perpetual Professional
CertificationSuperlative Chronometer (COSC + Rolex certification after casing)
CaseOyster (monobloc middle case, screw-down case back and winding crown)
Diameter44mm
MaterialOystersteel, satin and polished finish
Middle CaseOystersteel, satin finish with polished sides
BezelOystersteel, bidirectional 90° rotatable Ring Command
Cerachrom insert in blue ceramic with moulded inscription and numerals, coated with platinum via PVD (Physical Vapour Deposition)
Case backSolid, screw down with fine fluting
Winding CrownScrew-down; Triplock triple waterproofness system
CrystalScratch-resistant sapphire
Waterproofness100 metres (330 feet)
Movement
Calibre4161, Manufacture Rolex
Mechanical movement with bidirectional self-winding via Perpetual rotor
Precision-2/+2 sec./day, after casing
FunctionsCentre, hour, minute and seconds hands, small seconds at 6 o’clock Programmable regatta countdown with mechanical memory, retrograde minute hand, on-the-fly synchronization of the countdown seconds and minute hands
Stop-seconds for exact time setting
OscillatorFrequency: 28,800 beats/hour (4Hz)
Paramagnetic blue Parachrom hairspring
Rolex overcoil
Large balance wheel with variable inertia
High-precision regulating via four gold Microstella nuts
Traversing balance bridge
Jewelling42 rubies
Power ReserveApproximately 72 hours
Dial
ColourWhite lacquer, blue small seconds counter
Hour MarkersHighly legible Chromalight appliques (long-lasting luminescence, blue glow) in 18 ct white gold
Hands18 ct white gold, highly legible Chromalight (long-lasting luminescence, blue glow)
Bracelet
TypeOyster, three-piece solid links
MaterialOystersteel, polished centre links, satin-finished outer links with polished edges
ClaspOysterlock folding safety clasp
Easylink 5 mm comfort extension link

Featured image ©Rolex