Exterior: Stainless steel Case back: See-through & Screw case back Glass Material: Dual-curved sapphire crystal Glass Coating: Anti-reflective coating on inner surface Case size: Diameter 40.0mm Lug-to-lug 46.2mm Thickness 14.0mm Band width: 19mm Clasp type: Three-fold clasp with push button release The perimeter of Band: 195mm Movement Caliber no.: 9S86 Instructions Movement Type: Automatic with manual winding Power reserve: Approx. 55 hours Mean daily rate: +5 to -3 seconds per day Mean daily rate is a mean value of daily rates in a condition where the movement before assembly in a case is measured in six positions in a fixed manner under artificially controlled environment for 12 days. Functions Water resistance: 10 bar Magnetic resistance: 4,800 A/m Weight: 159 g Other details / Features: Screw-down crown 37 jewels 24-hour hand (dual time display function) Calendar-linked time difference adjustment function