Hamilton

Frogman Auto

Reference Number :

H77485130

Series : Khaki Navy

Retail: $1,295

(As of: 06/2025)

This watch is not for sale, this page is just for reference purposes only. If you would like to purchase this watch, please contact Hamilton. If you are interested in selling this watch to us, you can contact us here.

Quick TakeDon't let the serious specs fool you; the Frogman has a personality that most desk-divers can only dream of. This isn't just a watch; it's a piece of gear that feels earned, even if the most demanding environment it faces is the office on a casual Friday. The 41mm case size hits that modern sweet spot, robust without being ridiculous, and the prominent crown guard is pure, functional bravado. While the 300-meter water resistance and screw-down crown are talking points for its deep-sea credentials, the real daily-wear hero is the H-10 movement inside. An 80-hour power reserve means you can give it a rest for the weekend and find it still ticking accurately on Monday morning. That pop of orange on the minute hand isn't just for underwater legibility; it's a flash of confidence, a hint that its owner values performance but doesn't take themselves too seriously. It’s a capable tool that cleans up nicely.

DescriptionThe Hamilton Khaki Navy Frogman, reference H77485130, is engineered for demanding underwater environments. Its case is constructed from stainless steel and measures 41mm in diameter with a thickness of 13.09mm and a lug width of 20mm for strap or bracelet attachment. The black dial is protected by a sapphire crystal that incorporates an anti-reflective coating to ensure maximum legibility under various lighting conditions. A screw-down crown, integral to its water resistance capabilities, is shielded by a robust protective bridge. The watch is rated for a water resistance of 30 bar, which is equivalent to 300 meters or 435 pounds per square inch, making it suitable for professional diving applications. The unidirectional rotating bezel allows for the tracking of elapsed time, a critical function for diver safety.

Internally, this timepiece is powered by the Hamilton Caliber H-10, an automatic self-winding movement. A key feature of this caliber is its extended power reserve of 80 hours, allowing the watch to remain operational for over three days without being worn or wound. The movement's precision and reliability are enhanced by the inclusion of a Nivachron balance spring, which offers superior resistance to magnetic fields, temperature variations, and shocks. The watch is fitted with a stainless steel bracelet (strap reference H6050000111) that integrates seamlessly with the case. This bracelet secures to the wrist using a folding clasp that has a width of 26mm, providing a secure and confident fit for the wearer during any activity.

GenderMen

SignaturesHamilton

Country of OriginSwitzerland

Case Size41 mm

MovementAutomatic

CaliberH-10

FunctionsHours, Minutes, Seconds

Power Reserve80 Hours

Case MaterialsStainless Steel

Bezel MaterialsStainless Steel

Lug MaterialsStainless Steel

Dial ColorBlack