Calibre Number H855 Solar Power Movement ±15 seconds per month Precision Power save function Alarm function (daily alarm) Full-auto calendar correct to the December 31, 2100 LED (the built-in illuminating light) function Stainless steel Case (hard coating) Case Thickness:14.2mm Case Diameter:46.9mm Lug-to-lug:50.9mm Hardlex Crystal LumiBrite on hands, index(es) and bezel Three-fold clasp with secure lock , push button release with extender Distance between lugs 22 Water Resistance 200m / 660ft diver's Magnetic Resistance 4,800 A/m Weight 184g LIMITED EDITION on the case back Serial number engraved on the case back Screw case back Unidirectional rotating bezel Screw-down crown Three-fold clasp with secure lock Screw case back