Hamilton H69509110 Khaki Field Mechanical Power ReserveThe Khaki Field Mechanical Power Reserve 40mm honors the heritage design and essential functionality of the Khaki family, while introducing modern features and the latest in watchmaking technology and innovation. With a new manual-winding H-23 movement, developed by ETA exclusively for Hamilton, it allows (for the first time) for the 80-hour power reserve to be visualized directly on the dial. Fitted with a stainless steel metal bracelet, the white dial proudly displays "power reserve 80 hours" and shows "F" for full and "E" for empty, to underscore this exceptional and utility-focused feature.CONSTANT PRECISIONHonoring field watch heritage while adding a bold novelty: a dial-integrated power reserve for constant precisionPOWER ON DISPLAYA major evolution for the original field watch, discover the Khaki Field Power Reserve MechanicalA FAITHFUL COMPANIONInspired by the military, built to last, this is the original soldier's watch.MANUAL WINDINGWind your mechanical watch by turning the crown clockwise until it blocks.STAINLESS STEEL CASEA highly resistant alloy composed of steel and chromium. It can be worked to resemble a precious metal. It is nearly impervious to rust, tarnish, and corrosion.SAPPHIRE CRYSTALSynthetic sapphire crystal is a tough scratch-resistant material, only diamonds could leave a mark.NIVACHRON™ BALANCE SPRINGNivachron™ is an alloy used to produce balance spring to resist magnetic fields and improve accuracy. It reduces the effects of magnets, temperature, and shocks.WATER RESISTANCEYour timepiece is resistant up to 10 bar (100m) / 145 psi (328 ft).