When you head out on an expedition, the best gear is reliable, resilient and compact. The Hamilton Khaki Field Auto 38mm on a steel bracelet follows that philosophy exactly, packing serious capability into a case that never overwhelms the wrist.

Its appeal starts with the movement. The automatic H-10 caliber winds itself as you move and holds up to 80 hours of power reserve, enough to sit on a dresser from Friday evening to Monday morning and still be running. A Nivachron balance spring improves resistance to magnetism, and an exhibition caseback lets you watch the rotor at work. The black dial borrows its bold, readable style from the original soldier’s watch that defines the Khaki Field line.

The bracelet with folding clasp adds heft and a polished, go-anywhere quality. With 100m of water resistance, sapphire crystal and a 38mm case that is 11mm thick and 47mm lug to lug, this is a field watch you can swim, hike and commute with.

Hamilton Khaki Field Auto 38mm Bracelet, Ref. H70455133

• Reference: H70455133, Khaki Field Auto 38mm
• Case: stainless steel, 38mm by 11mm, 47mm lug to lug
• Dial: black with Super-LumiNova
• Movement: self-winding Hamilton H-10 with Nivachron balance spring
• Power reserve: up to 80 hours
• Crystal and caseback: sapphire front, open caseback
• Water resistance: 100m (10 bar)
• Bracelet: stainless steel with folding clasp

Automatic convenience, military DNA and a steel bracelet: an easy one-watch answer for active lives.