Case Size:

Approx. 40 mm in diameter (Rolex lists this as 40 mm — modern Rolex rarely round up to “41 mm”) 

Case Material:

Oystersteel (Rolex’s proprietary 904L stainless steel) 

Bezel:

Bidirectional rotatable 24-hour graduated bezel with two-colour red and blue Cerachrom insert (often referred to as the “Pepsi” bezel) 

Crystal:

Scratch-resistant sapphire crystal with Cyclops lens over the date 

Water Resistance:

Waterproof to 100 m / 330 ft 

Movement:

Rolex Calibre 3285 — Perpetual, mechanical, self-winding GMT movement 

Oscillator / Balance:

Paramagnetic blue Parachrom hairspring and high-performance Paraflex shock absorbers 

Power Reserve:

Approximately 70 hours 

Functions:

Hours, minutes, seconds

Date at 3 o’clock

24-hour hand for second time zone

Independently adjustable local hour hand

Stop-seconds for precise time setting 

Bracelet Options:

Typically comes on a Jubilee bracelet (five-piece links) with folding Oysterlock safety clasp and Easylink 5 mm comfort extension link 

Some owners may fit an Oyster bracelet, but Rolex ships the 126710BLRO mainly with Jubilee 

Clasp:

Folding Oysterlock safety clasp with Easylink comfort extension link (approx. 5 mm) 

Dial Options:

Primarily black dial for this reference 

(Rolex offers various dial finishes across different GMT models, but ref. 126710BLRO is most commonly paired with the black dial.)

Markers / Hands:

Applied markers and hands with Chromalight luminescence for enhanced visibility 

Certification:

Superlative Chronometer (COSC certified and then Rolex tested after casing; −2/+2 sec/day)