The Hamilton Khaki Navy Frogman Automatic H77825331 is the ultimate expression of Hamilton’s maritime expertise. Originally designed for U.S. Navy Frogman teams in World War II, the modern Frogman remains Hamilton’s most technically capable diving watch, built for underwater endurance and above-surface adventure.

Its bold 46 mm stainless steel case is equipped with a uniquely shaped crown protector for enhanced safety and functionality. The robust case is complemented by a tactical black rubber strap with a wave-like texture, offering both comfort and durability in extreme conditions.

The black dial with luminous markers and hands ensures exceptional legibility, even in low-light or underwater environments. Protected by a scratch-resistant sapphire crystal with anti-reflective coating, the watch is as tough as the ocean it’s built to conquer.

At its heart beats the Hamilton H-10 automatic movement, delivering an impressive 80-hour power reserve and equipped with a Nivachron™ balance spring for enhanced resistance to magnetism and shock. With water resistance up to 30 bar (300 m / 1000 ft) and a screw-down crown, it is a professional-grade diver’s instrument designed for ultimate reliability.

Technical Specifications:

• Reference: H77825331

• Movement: Automatic, caliber H-10

• Functions: Hours, minutes, seconds, date

• Case Size: 46 mm

• Thickness: 13.58 mm

• Case Material: Stainless steel with crown protector

• Dial Color: Black

• Crystal: Sapphire with anti-reflection

• Lug Width: 22 mm

• Strap: Black rubber strap with wave texture, pin buckle (20 mm)

• Water Resistance: 30 bar (300 m / 1000 ft)

• Power Reserve: 80 hours

• Additional Features: Screw-down crown, Nivachron™ balance spring

The Hamilton Khaki Navy Frogman Automatic H77825331 is a professional diving companion with the endurance to withstand the ocean’s toughest challenges. With its bold design, superior water resistance, and long-lasting automatic movement, it combines heritage military reliability with modern watchmaking innovation—a perfect timepiece for adventurers on land and at sea.