Hamilton Watch Khaki Field Auto H70305993. Rugged and edgy, the Hamilton watches Khaki Field is perfect for the outdoorsmen. Each piece in the line has bold dials with large numerals and wearers have a choice of colors and textures that unite with innovation in the form of the exclusive H-10 movement. This caliber has 80 hours of power reserve to meet the toughest performance expectations. These watches are designed for the adventurous, active wearer.