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 bezelGlass Material: Dual-curved sapphire crystalGlass Coating: Anti-reflective coating on inner surfaceLumi Brite: Lumibrite on hands and indexesCase size: Diameter 40.5mm × Thickness 14.7mmClasp type: Three-fold clasp with push button releaseMovement:Caliber No: 9R66Movement Type: Spring DrivePower reserve: Approx. 72 hours(3 days)Accuracy: ±1 second per day / ±15 seconds per month (average)Features:Water resistance: 20 barMagnetic resistance: EquippedWeight: 172.0 g24-hour hand (dual time display function)30 jewelsCalendar-linked time difference adjustment functionCase back with lion emblemDate displayPower reserve displayScrew case backScrew-down crownStop seconds hand functionGrand Seiko Style #: SBGE255...