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: