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.
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 x Thickness 14.7mm
Clasp type - Three-fold clasp with push button release
Caliber no. - 9R66
Movement Type - Spring Drive
Power reserve - Approx. 72 hours (3 days)
Accuracy - +/- 1 second per day / +/- 15 seconds per month (average)
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 seconds hand function