Climbing mountains, trekking through the forest or negotiating the urban jungle: The Khaki Field Auto is equal to your needs out in the field. With the exclusive H-10 automatic caliber offering up to 80 hours of power reserve, it won't let you down. Hamilton’s Khaki Field Collection features a range of classic army style watches. Military watches are designed to be rugged, resilient and robust. Built for those that brave the outdoors.