Case

Case Size: 40 mm diameter

Case Material: Oystersteel (904L stainless steel) + 18 ct yellow gold (Rolesor)

Case Thickness: ~11.9 mm

Water Resistance: 100 meters / 330 feet

Crown: Screw-down Triplock winding crown with crown guards

Caseback: Solid, screw-down

Bezel

Type: Bidirectional rotatable 24-hour graduated bezel

Material: Black and grey Cerachrom ceramic insert

Details:

Numerals and graduations in yellow gold coating (via PVD process)

Not platinum (platinum is used on steel models like BLNR/GRNR, but 126713GRNR uses gold)

Crystal

Scratch-resistant sapphire

Cyclops lens over the date

Movement

Calibre: Rolex Calibre 3285

Type: Self-winding mechanical GMT movement (Perpetual rotor)

Frequency: 28,800 vph (4 Hz)

Jewels: 31

Power Reserve: ~70 hours

Functions:

Hours, minutes, seconds

24-hour GMT hand (second time zone)

Independent rapid-setting local hour hand

Instantaneous date at 3 o’clock

Stop-seconds (hacking)

Oscillator / Balance

Hairspring: Blue Parachrom hairspring

Escapement: Chronergy escapement

Balance Wheel: Variable inertia (Microstella)

Shock Protection: Paraflex

Dial

Color: Black lacquer dial

Hour Markers: Applied 18 ct yellow gold markers with Chromalight (blue lume)

Hands:

Mercedes-style hour hand and minute hand in yellow gold

GMT hand: Yellow gold with arrow tip (NOT green — green is exclusive to models like the Sprite/VTNR)

Luminous central seconds hand

Bracelet

Options:

Oyster bracelet (three-link)

Jubilee bracelet (five-link)

Material: Oystersteel and 18 ct yellow gold (Rolesor)

Clasp: Oysterlock folding safety clasp

Extension: Easylink 5 mm comfort extension

Certification

Superlative Chronometer (COSC + Rolex certification after casing)

Accuracy: −2 / +2 seconds per day

Warranty: 5 years