TechnologyCal. 4r35 AutomaticMovementAutomaticCase Size40.5mmCase MaterialStainless SteelBand MaterialGenuine LeatherFeatures21,600 Vibrations Per Hour23 JewelsPower Reserve (approximately 41 Hours)See-through Case BackSelf-winding With Hand Winding CapabilityOther FeaturesBuckleWater-Resistance50m Also Known As SARY133