Case: Bright titanium (with ceramic accents) Case back: Bright titanium and sapphire crystal Case back type: See-through screw-down case back Crystal material: Box-shaped sapphire Coating: Anti-reflective coating on the inner surface LumiBrite: Yes (hands and hour markers) Case Size: Width 43.2mm, Height 51.5mm, Thickness 15.3mm Strap Width: 23mm Clasp: One-push triple-fold clasp Wrist Circumference (Max): 195mm Movement: 9SC5 Instructions Power source: Mechanical, self-winding (with manual winding) Power reserve: Approximately 72 hours when fully wound Static accuracy: Average daily deviation of +5 seconds to -3 seconds This accuracy is based on Grand Seiko’s proprietary standards and was measured on the movement alone before leaving the factory under conditions of 6 different positions and 3 temperature variations.This differs from the accuracy (wearing accuracy) under the actual conditions in which customers use the watch. Additionally, due to the nature of mechanical models, the accuracy may exceed the aforementioned range depending on usage conditions (wearing time, temperature, arm movement, and strong shocks or vibrations). Wearing accuracy: Daily deviation of +8 to -1 second Water resistance: Enhanced water resistance for daily use (10 atm) Anti-magnetic: Yes Weight: 154 g Other: Screw-lock crown Metal allergy-resistant Equipped with a tachymeter Number of jewels: 60 Stopwatch function (30-minute counter, 12-hour counter).