Grand Seiko Sport Collection Spring Drive GMT Rock-Pattern

SBGE 277

A Spring Drive GMT watch with a rock-pattern dial

All Grand Seiko Spring Drive timepieces are designed, made, assembled, and adjusted by the skilled craftsmen and women of the Shinshu Watch Studio, which is located in central Japan and surrounded by the Hotaka mountain range whose tallest summit is 3,190 meters high. As the Hotaka mountain range was created by volcanic activity, its peaks and slopes have sharp ridges and sheer cliffs which, even when carved by the wind and snow over the millennia, reveal nature at its most dramatic. The SBGE277 dial has the color and texture that typify the geology of the Hotaka range.

Thanks to Grand Seiko’s unique Spring Drive caliber, the second-hand glides silently and smoothly, with no ‘tick’, across the dial, perfectly reflecting the natural and continuous flow of time. The power reserve is 72 hours when fully wound and is shown on the discreet indicator next to the eight o’clock marker. The GMT hand on the SBGE277 allows a second-time zone to be shown and the hour can be adjusted without compromising the one-second-a-day precision of Spring Drive.

Movement 
Spring Drive GMT
Caliber: 9R66 
Power Reserve: 72 hours
Winding: Automatic
Accuracy: ±1 second per day / ±15 seconds per month (average)

Exterior
Case Material: Stainless steel 
Glass Material: Dual-curved sapphire crystal
Glass Coating: Anti-reflective coating on inner surface
Case size: Diameter 44mm, Thickness 14.7mm
Strap/Bracelet: Stainless steel bracelet
Clasp Type: Three-fold clasp with push button release

Other Details 
Water Resistance 20Bar
Functions: Hours, minutes, seconds, GMT
24-hour hand (dual time display function)
Calendar-linked time difference adjustment function
Case back with lion emblem
Date display
Power reserve display
Screw case back
Screw-down crown
Stop-seconds hand function
30 Jewels