Exterior: Stainless steel Case back: Screw case back Glass Material: Dual-curved sapphire crystal Glass Coating: Anti-reflective coating on inner surface LumiBrite: LumiBrite on hands, indexes and bezel Case size: Diameter 44.2mm Lug-to-lug 50.6mm Thickness 14.4mm Band width: 21mm Clasp type: Three-fold clasp with push button release The perimeter of Band: 201mm 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. Normal usage accuracy: +8 to -1 seconds per day Functions Water resistance: 20 bar Magnetic resistance: 4,800 A/m Weight: 188 g Other details / Features: Rotating bezel (24-hour display) Screw-down crown 37 jewels 24-hour hand (dual time di