The Hamilton Khaki Field Auto Chrono is for explorers who want to time things as well as tell time. Rugged, resilient and precise, it brings an automatic chronograph to the Khaki Field family in a bold 44mm case.

The black dial uses raised numerals coated with Super-LumiNova for strong legibility, and the chronograph layout gives it the look of a classic military instrument. Hamilton’s automatic H-21 caliber drives it, with a 60-hour power reserve and an H-pattern on the oscillating weight. The caseback carries a special engraving honoring Hamilton’s military heritage.

This is a substantial watch at 44mm across and 14.15mm thick, with 22mm lugs, a sandblasted steel case and a screw-down crown. Sapphire crystal with anti-reflective coating and 100m water resistance make it as tough as it looks, and the leather strap keeps it comfortable. Hamilton now lists this reference as a past collection model.

Hamilton Khaki Field Auto Chrono 44mm H71706830

• Reference: H71706830, Khaki Field Auto Chrono
• Case: 44mm sandblasted stainless steel, 14.15mm thick
• Crown: screw-down
• Dial: black with raised Super-LumiNova numerals
• Movement: H-21 automatic chronograph, 60-hour reserve
• Crystal: sapphire, anti-reflective
• Caseback: steel with military-heritage engraving
• Water resistance: 100m; strap: calf leather, 22mm

A big, capable chronograph with field-watch roots for the wearer who likes a tool with presence.