Hamilton Watch Khaki Field Auto Chrono H71706830. Rugged, resilient and precise, the Khaki Field Automatic Chronograph is the perfect timepiece for confident explorers. A special engraving on the case back of this 44mm sandblasted stainless steel field watch pays tribute to Hamilton's military heritage, and SuperLuminova-coated raised numerals add readability and depth to its dial. Paired with a comfortable leather bund strap, this high performance accessory is made for outdoor adventures.