ExteriorExterior: Bright titanium case (part ceramic) Back cover: Bright titanium and sapphire glassBack cover specifications: See-through screw backGlass material: Box-shaped sapphireCoating: Inner non-reflective coatingLumibrite: Yes (hands and indexes)Case size: Width 43.2mm Length 51.5mm Thickness 15.3mmBand width: 23mmClasp: One-push triple foldingWrist circumference length (maximum): 195mmMovementMovement: 9SC5 InstructionsDrive method: Mechanical automatic winding (with manual winding)Power reserve: Approximately 72 hours at maximum windStatic accuracy: Average daily difference +5 seconds to -3 secondsThe accuracy is measured when the movement is in a standalone state, under conditions of 6 positions and 3 temperature variations before factory shipment according to Grand Seiko’s unique standards. It differs from the accuracy in the environment in which the customer will actually use it (on-wrist accuracy). Additionally, due to the characteristics of mechanical models, depending on the conditions under which it is used (wear time, temperature, wrist movement, strong shocks or vibrations), it may exceed the stated accuracy range.On-wrist accuracy: Daily difference +8 to -1 secondsFunctionsWater resistance: Daily life enhanced water resistance (10 ATM)Anti-magnetic: YesWeight: 154 gOther:Screw lock type crownMetal allergy resistantWith tachymeterNumber of jewels 60Chronograph function (30-minute counter, 12-hour counter)