This is simplicity at its best. The Khaki Field Officer Handwinding offers basic functions and components for the no-nonsense, rugged watch wearer. Available with a choice of leather or canvas strap it is a timepiece not to be overlooked.KHAKI FIELDFrom the original soldier's watch to rugged and robust new models designed for life's adventurers, the Khaki Field collection was inspired by military and built to last.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.H-50 CALIBERAn exclusive caliber specifically developed for our handwinding watches, the H-50 has an extended power reserve of up to 80 hours.WATER RESISTANCEYour timepiece is resistant up to 5 bar (50m) / 73 psi (164 ft).