Hi-Beat GMT SBGJ237G

The First Grand Seiko triple time zone model, with rotating bezel and 9S mechanical calibre. Midnight blue dial and blue and white sapphire crystal bezel.

Powered by the 9S86 Mechanical movement; sophisticated watchmaking innovation through its precision controlling mainspring, the hairspring, and the escapement. Together the movement showcases the power and dynamism of the Mechanical Hi-Beat 36,000.

Grand Seiko: the relentless quest for precise timekeeping from the pinnacle of Seiko Watch Corporation’s in-house manufacture.With leading watchmaking, durability and legibility, every Grand Seiko is still handmade in Japan by elite craftsmen and women.

Exterior
Case Material : Stainless steel
Glass Material : Dual-curved sapphire crystal
Glass Coating : Anti-reflective coating on inner surface
LumiBrite : LumiBrite on hands, index(es) and bezel
Case size : Diameter 44.2mm Lug-to-lug 50.6mm Thickness 14.4mm
The perimeter of Band : 201mm
Clasp type : Three-fold clasp with push button release

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

Functions
Water resistance : 20 bar
Magnetic resistance : 4,800 A/m
Weight : 188.0 g

Other details / Features :
・24-hour hand (dual time display function)
・37 jewels
・Calendar-linked time difference adjustment function
・Case back with lion emblem
・Date display
・Rotating bezel (24-hour display)
・Screw case back
・Screw-down crown
・Stop seconds hand function