Rolex Explorer II

Rolex Explorer II

CATEGORYOyster Perpetual Professional
CertificationSuperlative Chronometer (COSC + Rolex certification after casing)
Case
TypeOyster (monobloc middle case, screw-down case back and winding crown)
Diameter42mm
SafetyCrown guard forms integral part of middle case
MaterialOystersteel
Middle CaseOystersteel, satin finish with polished sides
BezelOystersteel, fixed, 24-hour graduated
Case backSolid, screw down with fine fluting
Winding CrownScrew-down; Twinlock double waterproofness system
CrystalScratch-resistant sapphire
Cyclops lens over the date with double anti-reflective coating
Waterproofness100 metres (330 feet)
Movement
Calibre3187, Manufacture Rolex
Mechanical movement with bidirectional self-winding via Perpetual rotor
Precision-2/+2 sec./day, after casing
FunctionsCentre hour, minute and seconds hands
Instantaneous date at 3 o’clock, secure setting via the hour hand Reference time (home time) via additional 24-hour hand
Second time zone (local time) via conventional hands,
independent rapid-setting of the hour hand
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
High-performance Paraflex shock absorbers
Jewelling31 rubies
Power ReserveApproximately 48 hours
Dial
ColourWhite lacquer
Hour MarkersHighly legible Chromalight appliques (long-lasting luminescence, blue glow) in 18 ct white gold with black PVD coating
Hands18 ct white gold, black PVD coating (except orange 24-hour hand) Chromalight (long-lasting luminescence, blue glow)
Bracelet
TypeOystersteel, three-piece solid links
MaterialOystersteel, satin finish with polished edges
ClaspOysterlock folding safety clasp
Easylink 5mm comfort extension link

Featured image ©Rolex