The Hamilton Khaki Navy Frogman Auto H77485130 is the version of the Frogman you can wear everywhere. A black dial, a 41mm stainless steel case and a matching steel bracelet create a clean, purposeful diver that looks as right with a button-down as it does with a wetsuit.

Its roots go back to the original Hamilton Frogman, made for U.S. Navy frogman teams and seen in the 1951 film The Frogmen. The modern watch keeps the spirit through its most recognizable feature, a bridge-shaped guard wrapped around the screw-down crown. Super-LumiNova on the hands and markers keeps it legible in any conditions, and the anti-reflective sapphire crystal resists scratches.

Hamilton’s H-10 automatic caliber runs inside, with an 80-hour power reserve and a Nivachron balance spring that helps it shrug off magnetic fields. At 13.09mm thick, this bracelet version is the slimmer of the 41mm Frogman cases, and it closes with a folding clasp. Water resistance is 300 meters, so it’s ready for real dives, not just the hotel pool.

Frogman Auto 41mm H77485130 specs

• Case: stainless steel, 41mm, 13.09mm thick
• Dial: black, Super-LumiNova hands and markers
• Movement: automatic H-10, three hands
• Power reserve: 80 hours, Nivachron balance spring
• Crystal: sapphire, anti-reflective
• Crown: screw-down, bridge-shaped guard
• Water resistance: 300m (30 bar)
• Bracelet: stainless steel with folding clasp, 20mm lugs

An all-steel diver with military roots and a movement that keeps going all weekend.