Case
Case Size: 40 mm diameter
Case Material: Oystersteel (904L stainless steel)
Case Thickness: approximately 11.9 mm
Water Resistance: 100 meters / 330 feet
Case Construction: Monobloc middle case with screw-down caseback
Crown: Screw-down Triplock triple waterproofness system
Crystal: Scratch-resistant sapphire crystal with Cyclops date magnifier
Bezel
Type: Bidirectional rotatable 24-hour graduated bezel
Material: Two-colour grey and black Cerachrom ceramic insert
Numerals/Graduations: Moulded and coated via PVD platinum deposition
Movement
Calibre: Rolex Calibre 3285
Type: Perpetual, mechanical, self-winding GMT movement
Frequency: 28,800 vibrations per hour (4 Hz)
Jewels: 31
Power Reserve: Approximately 70 hours
Winding: Bidirectional Perpetual rotor
Functions
Hours, minutes, central seconds
24-hour GMT hand
Second time zone display
Independent rapid-setting local hour hand
Instantaneous date at 3 o’clock
Stop-seconds for precise time setting
Oscillator / Balance
Hairspring: Blue Parachrom hairspring
Escapement: Chronergy escapement
Balance Wheel: Variable inertia balance with Microstella nuts
Shock Protection: High-performance Paraflex shock absorbers
Dial
Dial Color: Black lacquer dial
Text Accent: Green “GMT-Master II” text
Hour Markers: Applied 18 ct white gold with Chromalight luminescence
Luminescence: Long-lasting blue glow
Hands
Mercedes-style hour hand
Minute hand in white gold
Green arrow-tipped 24-hour GMT hand
Luminous central seconds hand
Bracelet Options
Oyster Bracelet Version (126710GRNR-0004)
Bracelet Type: Oyster, three-piece solid links
Material: Oystersteel
Clasp: Oysterlock folding safety clasp
Extension: Easylink 5 mm comfort extension link
Jubilee Bracelet Version (126710GRNR-0003)
Bracelet Type: Jubilee, five-piece links
Material: Oystersteel
Clasp: Oysterlock folding safety clasp
Extension: Easylink 5 mm comfort extension link
Certification
Certification: Superlative Chronometer
COSC-certified movement
Rolex certification after casing
Accuracy: −2 / +2 seconds per day after casing
Warranty: 5-year Rolex International Warranty