Side by side

Differs

Rolex Air‑King126900

Rolex GMT‑Master II126710BLNR

Shape: Round; Round; Round
Diameter: 40 mm; 40 mm; 40 mm
Thickness: 11.9 mm; Not known; Not known
Lug width (differs): 20 mm; 21 mm; 20 mm
Material: Oystersteel; Oystersteel; Oystersteel
Bezel (differs): Tachymeter; Smooth; Bidirectional rotating
Bezel insert (differs): Cerachrom ceramic, Black; Not known; Cerachrom ceramic, Blue/black
Caseback: Screw-down; Screw-down; Screw-down
Crystal: Sapphire; Sapphire; Sapphire
Cyclops (differs): No; No; Yes
Crown: Screw-down; Screw-down; Screw-down
Water resistance: 100 m; 100 m; 100 m

Calibre (differs): Rolex 4131; Rolex 3230; Rolex 3285
Type: Automatic; Automatic; Automatic
Origin: In-house; In-house; In-house
Power reserve (differs): 72 h; 70 h; 70 h
Frequency: 28,800 vph (4 Hz); 28,800 vph (4 Hz); 28,800 vph (4 Hz)
Jewels (differs): 47; 31; 34
Certification: Superlative Chronometer; Superlative Chronometer; Superlative Chronometer
Functions (differs): Centre hour and minute hands, small seconds hand at 6 o'clock
Chronograph via centre seconds hand, 30-minute counter at 3 o'clock and 12-hour counter at 9 o'clock
Stop seconds for exact time setting; Centre hour, minute and seconds hands
Stop-seconds for precise time setting; Centre hour, minute and seconds hands
24-hour display
Second time zone with independent rapid-setting of the hour hand
Instantaneous date
Stop-seconds for precise time setting
Complications (differs): Chronograph
Small seconds; Central seconds
Hacking (stop) seconds; Central seconds
Date
GMT / second time zone
Hacking (stop) seconds

The watches side by side