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OYSTER PERPETUAL 

EXPLORER II

 CASE

Type OYSTER (monobloc middle case, screw-down case back and winding crown)

Diameter 42 mm

Material 904Lstainless steel superalloy, polished and satin finished

Case back Screw-down with Rolex fluting

Bezel Fixed, 24-hour graduated, sun satin finished, polished bevelled edge

Winding crown Screw-down, TWINLOCK double waterproofness system Shoulders to protect the crown

Crystal Scratch-resistant sapphireCYCLOPS lens (2.5 ×) over the date, double anti-reflective coating

Waterproofness 100 metres (330 feet)

MOVEMENT

Calibre 3187,

Manufacture Rolex

Precision Officially certified Swiss chronometer

Functions 24-hour handGMT with independent rapid-setting of the hour handInstantaneous date at 3 o’clockStop-seconds for precise time setting

Oscillator Frequency: 28,800 beats/hour (4 Hz)Non-magnetic blue PARACHROM hairspring Breguet overcoilLarge balance wheel with variable inertia High-precision regulating via four gold MICROSTELLA nuts Traversing balance bridgeHigh-performance PARAFLEX shock absorbers

Jewelling 31 rubies

Winding Bidirectional self-winding via PERPETUALrotor

Power reserve Approximately 48 hours

DIALS

White lacqueredCHROMALIGHT display with long-lasting luminescence

Hands White gold, wide, hollowed, black lacqueredOrange 24-hour hand

Black, satin finishedCHROMALIGHT display with long-lasting luminescence

Hands White gold, wide, hollowed, "phantom effect" (black base on black dial)Orange 24-hour hand, "phantom effect" (black base on black dial)

Hour markers Highly legible white gold appliques

BRACELET

Type OYSTER, three-piece solid links

Material 904Lsteel superalloy, satin finished, polished edge

Clasp OYSTERLOCK folding clasp with safety catchEASYLINK 5 mm comfort extension link

Source, www.Rolex.com