Hamilton Khaki Field White Dial Automatic H69439511 Men's Watch The Khaki Field Mechanical automatic is a reincarnation of the original 1960s model and retains its military routes. Powered by Hamilton’s exclusive hand-wound movement, it has a power reserve of 80 hours; double of the normal. An excellent durability owes to both the stainless steel case and the topping sapphire glass, which helps the watch to retain its new looks for longer.