Caliber 9F was developed to allow the creation of the ultimate quartz watch and is now widely recognized as one of the finest quartz calibers in the world. The suitability of this remarkable Grand Seiko quartz movement to the international traveler is enhanced by the addition of a GMT hand. The high precision (+/- 10 seconds a year) of Caliber 9F86 is not compromised when the time zone is changed as the watch continues to keep perfect time even when the crown is pulled out and the hour hand is moved to adjust the local time. The GMT hand is clearly differentiated in design from the hour and minute hands and the 24-hour dial ring is divided into two 12-hour sections to allow AM and PM to be easily distinguished.
The hairline finish to the case, the 24-hour bezel, the radial pattern of the navy blue dial and the simple three-row bracelet give the watch a powerful appearance, while the screw-lock crown keeps the watch airtight and 20 bar water resistant, making it durable enough to withstand all life’s challenges.
Exterior
外装: stainless
裏ぶた: screw back cover
ガラス材質: dual curve sapphire
コーティング: Inner non-reflective coating
ルミブライト: Yes (needle/index)
ケースサイズ: Width 39.0mm Length 45.9mm Thickness 12.3mm
バンド幅: 19mm
中留: One-push three-fold method
腕周り長さ（最長）: 203mm
Movement
ムーブメント: 9F86
駆動方式: battery-poweredquartz
精度: ±10 seconds per year
Functions
防水: Reinforced waterproof for everyday life (20 bar)
耐磁: can be
重量: 151g
その他: ・24 hour hand (dual time display function)
・Calendar interlocking time difference correction function ・Screw lock type crown
