GRAND SEIKO Sport ref. SBGE257G

ExteriorCase Material : Stainless steel with ceramic bezelGlass Material : Dual-curved sapphire crystalGlass Coating : Anti-reflective coating on inner surfaceLumi Brite : Lumibrite on hands and indexsCase size : Diameter 40.5mm × Thickness 14.7mmClasp type : Three-fold clasp with push button releaseMovementCaliber no. : 9R66    InstructionsMovement Type : Spring DrivePower reserve : Approx. 72 hours(3 days)Accuracy : ±1 second per day / ±15 seconds per month (average)FunctionsWater resistance : 20 barMagnetic resistance : EquippedWeight : 172.0 gOther 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