Hamilton

Frogman Auto

Reference Number :

H77455360

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 TakeSome watches tell time, but the Frogman tells a story of readiness. It wears its purpose on its sleeve, or rather, on its ruggedly handsome green dial. This isn't just a watch; it's a piece of essential gear that happens to look incredible. The spirit of the original naval demolition team timepieces is alive in its DNA, from the assertive crown guard that looks like a submarine hatch to its impressive 300-meter water resistance. But inside beats a modern heart: the H-10 automatic movement. Knowing you have an 80-hour power reserve is a quiet confidence booster—set it down on Friday, and it’s ready for action on Monday morning, no questions asked. The inclusion of a Nivachron balance spring is a subtle nod to the precision required when timing is critical. Strapped on with the practical, no-nonsense rubber band, it feels less like an accessory and more like a trusted partner for any venture, above or below the waves.

DescriptionEngineered for aquatic environments, the H77455360 features a 41mm stainless steel case with a total thickness of 14.95mm. The design incorporates a 20mm lug width for strap integration. Protection for the green dial is provided by a sapphire crystal, which includes an anti-reflective coating to ensure maximum legibility under various lighting conditions. A critical feature for its underwater application is the screw-down crown, a mechanism essential for achieving its substantial water resistance rating. The watch is certified to a depth of 300 meters, which corresponds to a pressure of 30 bar or 435 pounds per square inch. This capability classifies it as a professional-grade diving instrument, suitable for serious recreational and professional underwater activities.

Internally, the timepiece is powered by the Hamilton Caliber H-10 automatic movement. This three-hand caliber provides a significant 80-hour power reserve, allowing the watch to run autonomously for over three days without winding. The movement's architecture incorporates a Nivachron balance spring, a modern alloy that enhances resistance to magnetic fields and temperature variations, thereby improving chronometric stability and reliability. The watch is affixed to the wrist via a black rubber strap, identified by reference H6000001531, which is both durable and waterproof. It fastens with a stainless steel pin buckle that has a width of 18mm, ensuring a secure and comfortable fit during demanding use.

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

Case BackSapphire Crystal