GRAND SEIKO

SBGM221G

Grand Seiko 9S Mechanical GMT SBGM221G

Grand Seiko 9S Mechanical GMT SBGM221G

This classic GMT watch combines the style that has long captivated watch lovers with an evolved Caliber 9S66 movement. The watch has a 3-day power reserve and combines the latest in hairspring technology with an escapement developed through MEMS technology to achieve high accuracy and stability when worn.

Exterior
Exterior: Stainless steel
Case back: See-through case back
Case back with 6 screws
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 13.7mm
Band width: 19mm
Band Material: Leather Strap
Clasp type: Three-fold clasp with push button release
Movement
Caliber no.: 9S66 
Movement Type: Automatic with manual winding
Power reserve: Approx. 72 hours(3 days)
Mean daily rate: +5 to -3 seconds per day
Functions
Water resistance: Splash Resistant
Magnetic resistance: 4,800 A/m
Other details / Features:
  • 35 jewels
  • 24-hour hand (dual time display function)
  • Calendar-linked time difference adjustment function

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