Most hand-wound watches keep their remaining power a secret. The Hamilton Khaki Field Mechanical Power Reserve 40mm on a steel bracelet shows it right on the dial, turning a vintage-style field watch into a smart, practical everyday tool.

The black dial carries a power reserve display marked F and E, so you always know when it is time for a few turns of the crown. It is driven by the H-23 caliber, a manual-winding movement developed by ETA exclusively for Hamilton, with up to 80 hours of reserve and a Nivachron balance spring for resistance to magnetism and shocks. Hamilton describes the visible reserve as a first for the Khaki Field Mechanical family.

On the stainless steel bracelet with a folding clasp and Easy Click sizing, the watch feels solid and polished enough for the office. The 40mm case, 100m water resistance and anti-reflective sapphire crystal mean it is equally happy outdoors.

Power Reserve on Bracelet: Hamilton H69509130 Specs

• Hamilton Khaki Field Mechanical Power Reserve, ref. H69509130
• 40mm steel case, 11.95mm high, 20mm lugs
• Black dial with F/E power reserve indicator
• Hand-wound H-23 caliber, exclusive to Hamilton
• Up to 80 hours of autonomy
• Anti-reflective sapphire crystal
• 100m water resistance
• Stainless steel bracelet, folding clasp with Easy Click

A modern field watch with a useful twist, finished on steel for true all-day versatility.