Hamilton Watch Khaki Field Mechanical Bronze H69459530. The original soldiers watch gets an original upgrade with Hamiltons first ever bronze case. Each Hamilton watches Khaki Field Mechanical Bronze has a unique story that will unfold with each wear as its case develops a distinct patina over time. Powered by our exclusive hand wound H-50 movement, fitted to a titanium case back and matched with a soft brown leather NATO strap, this authentic 38mm favorite celebrates Hamiltons military heritage with an eye towards the future.