Grand Seiko Hi-Beat Mechanical GMT – 39.5 mm

Reference Number
SBGJ271G

TECHNICAL SPECIFICATIONS

Exterior
Exterior: Stainless steel
Caseback: Stainless steel and sapphire crystal
Glass Material: Box shaped sapphire crystal
Glass Coating: Anti-reflective coating on inner surface
Case size: Diameter 39.5mm Lug-to-lug 46.9mm Thickness 14.1mm
Band width: 19mm
Clasp type: Three-fold clasp with push button release
The perimeter of Band: 185mm

Movement
Caliber no.: 9S86 Instructions
Movement Type: Automatic with manual winding
Power reserve: Approx. 55 hours
Normal usage accuracy: +8 to -1 seconds per day
Mean daily rate: +5 to -3 seconds per day

Mean daily rate is a mean value of daily rates in a condition where the movement before assembly in a case is measured in six positions in a fixed manner under artificially controlled environment for 12 days.

Functions
Water resistance: Splash Resistant
Magnetic resistance: 4,800 A/m
Weight: 150 g

Other details / Features:
– 37 jewels
– 24-hour hand (dual time display function)
– Calendar-linked time difference adjustment function