Product image of SBGW309

GS9 Club exclusive model inspired by Icy Monsters Formed Mt. Iwate SBGW309

An exclusive for GS9 Club members that tributes the icy monsters formed near Mt. Iwate


Heritage Collection

USD 5,900.00


In the Northern mountainous regions of Japan, wind-blown ice covers the trees and takes on monstrous shapes known as snow monsters, orjuhyo(樹氷) in Japanese. Juhyo can be seen from Mt. Iwate on the neighboring Mt. Hachimantai, creating a distinct winter beauty in the Iwate prefecture. The dial of SBGW309 embraces the beauty of the sky and snow that create the silhouette of these monstrous forms. The 44GS, released in 1967, was the first to define the Grand Seiko Style and has evolved into a modern interpretation with contemporary practicality. The SBGW311 embodies Grand SeikoStyle in a stylish mid-size case at 36.5mm diameter with manually wound mechanical Caliber 9S64, providing the watch a 72-hour power reserve despite its compact size.


Exterior: Stainless steel
Case back: Screw case back
Glass Material: Box shaped sapphire crystal
Glass Coating: Anti-reflective coating on inner surface
Case size: Diameter 36.5mm Lug-to-lug 42.7mm Thickness 11.6mm
Band width: 18mm
Clasp type: Three-fold clasp with push button release
Caliber no.: 9S64 Instructions
Movement Type: Manual winding
Power reserve: Approx. 72 hours(3 days)
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.
Normal usage accuracy: +10 to -1 seconds per day
Water resistance: 10 bar
Magnetic resistance: 4,800 A/m
Other details / Features:
  • 24 jewels

Design in the Grand Seiko Style that embodies the aesthetic beauty of Japan

The year 1967 saw the release of the 44GS, the watch in which the Grand Seiko Style design language was fully realized. By modernizing the interpretation while seeking to re-create the design elements as much as possible, we have arrived at the evolved 44GS design. This model has inherited a design befitting Grand Seiko in all aspects, from the hands and dial to the case, taking the form of a watch that displays Japanese aesthetics in a modern fashion.

The green and rain of summer captured in Mt. Iwate’s ridged texture

The deep and cold blue of the cold winter months near Mt. Iwate is expressed in the GS9 Club exclusive SBGW309. The ridged texture of Mt. Iwate and its cool blue color serve as a tribute to the natural phenomenon known as juhyo, or snow monsters, that form on trees in the harsh winter.

Caliber 9S64

The manually wound movement features a maximum continuous power reserve of 72 hours (about three days). As the mainspring unwinds, its torque diminishes gradually to ensure that accuracy remains stable.

Learn more about Caliber 9S64