Hamilton

Frogman Auto

Reference Number :

H77825331

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 are built to tell time, but the Frogman feels like it was engineered to buy you more of it when every second counts. This is a serious piece of hardware, a purpose-built instrument that laughs in the face of pressure. That burly 46mm case and its distinctive crown-locking mechanism aren't for show; they're a promise of performance when you're deep below the waves. Forget worrying about a dead watch on a multi-day dive trip; the hefty 80-hour power reserve from the H-10 movement has you covered. The super-legible black dial, with its punch of orange on the minute hand, is pure function, designed for at-a-glance readings in murky conditions. Strapped on with that rugged rubber, it feels less like an accessory and more like essential equipment. It’s a modern tool watch with a military diver’s soul, ready for any mission you can dream up, above or below the surface.

DescriptionThe timepiece, designated as reference H77825331, is constructed around a substantial 46mm stainless steel case with a measured thickness of 13.58mm. Its architecture ensures high-pressure endurance, certified to a water resistance of 30 bar, which is equivalent to 300 meters or 934.2 feet (435 psi). A critical feature for its dive functionality is the screw-down crown, protected by a prominent bridge guard, which guarantees case integrity at depth. The black dial is shielded by a sapphire crystal, a material selected for its high scratch resistance, and is treated with an anti-reflection coating to maximize legibility in various lighting conditions. For strap and bracelet compatibility, the case incorporates a standard 22mm lug width.

Powering the watch is the Hamilton Caliber H-10, an automatic mechanical movement. This three-hand caliber is engineered for longevity and performance, providing a superior power reserve of 80 hours. The movement's reliability is further enhanced by the integration of a Nivachron balance spring, which offers increased resistance to magnetic fields, temperature variations, and shock. The movement's design features streamlined surfaces, befitting its functional purpose within the Khaki Navy collection. The watch is secured to the wrist by a green rubber strap (reference H6000001141) that tapers to a 20mm width at the fastening point, concluding in a stainless steel pin buckle for a secure fit.

GenderMen

SignaturesHamilton

Country of OriginSwitzerland

Case Size46 mm

MovementAutomatic

CaliberH-10

FunctionsHours, Minutes, Seconds

Power Reserve80 Hours

Case MaterialsStainless Steel

Bezel MaterialsStainless Steel

Lug MaterialsStainless Steel

Case BackSolid