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ROLEX OYSTER PERPETUAL DATEJUST 31MM
Brand: Rolex
Model: Datejust
Reference: 278240-0004
Dial numerals: Roman
Clasp type: Folding
Water resistance: 100
Bracelet color: Grey
Gender: Women
Power reserve: 55 hours
Glass: Anti-reflective and scratch-resistant sapphire crystal
Case diameter: 31 mm
Caliber: 2236
Dial: White
Movement: Self-winding
Case material: Stainless steel
Clasp material: Stainless steel
Bezel material: Stainless steel
Bracelet material: Stainless steel
Hours, minutes, seconds, date, chronometer.
Case:
Diameter: 31 mm.
Oystersteel.
Domed bezel.
Monobloc middle case.
Screw-down case back and winding crown.
Twinlock double waterproofness system.
Waterproof to 100 metres / 330 feet.
Dial:
White lacquered with Roman numerals.
Cyclops lens over the date.
Scratch-resistant sapphire crystal.
Movement:
Perpetual, mechanical, self-winding.
Calibre 2236, Manufacture Rolex.
Precision of -2/+2 sec/day, after casing.
Syloxi hairspring in silicon with patented geometry.
High-performance paraflex shock absorbers.
Bidirectional self-winding via perpetual rotor.
Superlative chronometer (COSC + Rolex certification after casing).
Power reserve of 55 hours.
31 jewels.
Frequency: 28,800 vibrations per hour.
Bracelet:
Oystersteel.
Jubilee, five-piece links.
Folding Oysterlock safety clasp with Easylink 5 mm comfort extension link.
