Exterior Exterior: Ever brilliant steel, Caseback: Ever brilliant steel and sapphire crystal Case back: See-through & Screw case back Glass Coating: Anti-reflective coating on inner surface Case size: Diameter 40.0mm Lug-to-lug 47.2mm Thickness 11.7mm Band width: 19mm Movement Caliber no.: 9SA5 Instructions Movement Type: Automatic with manual winding 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: 10 bar Other details / Features: Screw-down crown