Mechanical SBGW231G

When simplicity, elegance and function meet in one watch.

The SBGW231 expresses the ‘Grand Seiko Style’ design language of simplicity, purity and practicality.

Its slim profile and 37.3mm case size houses our manual-winding 9S movement with a power reserve of 72 hours and the accuracy rate of +5 to -3 seconds per day.

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 : Box shaped sapphire crystal
Glass Coating : Anti-reflective coating on inner surface
Case size : Diameter 37.3mm Lug-to-lug 44.3mm Thickness 11.6mm
Band Material : Crocodile leather

Movement
Calibre no. : 9S64 Instructions
Movement Type : Manual winding
Power reserve : Approx. 72 hours(3 days)
Mean daily rate : +5 to -3 seconds per day
Normal usage accuracy : +10 to -1 seconds per day

Functions
Water resistance : Splash Resistant
Magnetic resistance : 4,800 A/m
Weight : 61.0 g

Other details / Features :
・24 jewels
・Case back with 6 screws
・Case back with lion emblem
・See-through case back
・Stop seconds hand function