Hamilton Watch Khaki Field H71616535. The Khaki Field Auto Chrono completes the Khaki Field line with a chronograph, blending the rugged nature of the Khaki line with the proven craftsmanship expressed in its exclusive H 21 automatic caliber. Featuring two counters and a day date display, this Khaki Auto chrono is available in stainless steel and has 60 hours power reserve. Perfect for the outdoorsman, These watches are designed for the adventurous, active wearer.