A Spring Drive GMT for the next generation

Equipped with a GMT hand, this watch features Grand Seiko's unique Spring Drive caliber, 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.

Exterior
Case Material : Stainless steel with ceramic bezel
Glass Material : Dual-curved sapphire crystal
Glass Coating : Anti-reflective coating on inner surface
Lumi Brite : Lumibrite on hands and indexes
Case size : Diameter 40.5mm × Thickness 14.7mm
Clasp type : Three-fold clasp with push button release

Movement
Caliber no. : 9R66 Instructions
Movement Type : Spring Drive
Power reserve : Approx. 72 hours(3 days)
Accuracy : ±1 second per day / ±15 seconds per month (average)

Functions
Water resistance : 20 bar
Magnetic resistance : Equipped
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 display
・Screw case back
・Screw-down crown
・Stop second hand function