Side by side

Differs

Grand Seiko SportSBGJ277

Shape: Not known; Round; Not known
Diameter (differs): 44.2 mm; 44 mm; 45 mm
Thickness (differs): 14.4 mm; 15.65 mm; 15.9 mm
Lug to lug: 50.6 mm; Not known; Not known
Lug width (differs): 21 mm; 22 mm; Not known
Material: Stainless steel; Stainless steel; Stainless steel
Bezel: Not known; Unidirectional rotating; Not known
Caseback: Screw-down; Screw-down; Not known
Crystal (differs): Sapphire, Domed, Anti-reflective inside; Sapphire, Domed, Anti-reflective on both sides; Sapphire
Crown: Screw-down; Screw-down; Not known
Water resistance: 200 m; 200 m; 200 m
Antimagnetic: 60 gauss; Not known; Not known
Weight: 188 g; Not known; Not known

Calibre (differs): Grand Seiko 9S86; Breitling 13; Junghans J880.1
Type: Automatic; Automatic; Automatic
Origin: In-house; Not known; Not known
Power reserve (differs): 55 h; 48 h; 48 h
Frequency (differs): 36,000 vph (5 Hz); 28,800 vph (4 Hz); Not known
Jewels (differs): 37; 25; Not known
Functions (differs): Rotating bezel (24-hour display)
Screw-down crown
37 jewels
24-hour hand (dual time display function)
Calendar-linked time difference adjustment function; 1/4th second, 30 minutes, 12 hours
Dial aperture; Not known
Complications (differs): Date
GMT / second time zone; Chronograph
Date
Small seconds; Not known

The watches side by side