A Spring Drive GMT for the next generation
Equipped with a GMT hand, this watch features Grand Seiko’s unique Spring Drive calibre, which combines the motive force of a mainspring with the high precision of a quartz watch.
Housed in a water-resistant stainless steel case with ceramic bezel, a 24-hour GMT hand and Lumibrite indices for exceptional precision and legibility complemented by the smooth motion glide of Spring Drive.
Case Material : Stainless steel with ceramic bezel Glass Material : Dual-curved sapphire crystal Glass Coating : Anti-reflective coating on inner surface LumiBrite : Lumibrite on hands and index(es) Case size : Diameter 40.5mm Lug-to-lug 48.7mm Thickness 14.7mm Clasp type : Three-fold clasp with push button release
Movement
Calibre no. : 9R66 Movement Type : Spring Drive Power reserve : Approx. 72 hours(3 days) Accuracy : ±15 seconds per month (±1 second per day)
Functions
Water resistance : 20 bar Magnetic resistance : 4,800 A/m Weight : 172.0 g Other details / Features :
・24-hour hand (dual time display function) ・30 jewels ・Calendar-linked time difference adjustment function ・Case back with lion emblem ・Date display ・Power reserve indicator ・Screw case back ・Screw-down crown ・Stop seconds hand function