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Hamilton · Frogman

Strap for Frogman Auto 46 Stainless Steel / Black / Rubber

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

22mm
22 mm strapsAll Hamilton
Lug width22 mm
Case diameter46 mm
ReferenceH77825330
FamilyFrogman
MovementHamilton caliber H-10 ND hours, minutes, seconds
Year2022
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

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Straps for the Frogman H77825330

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Frogman H77825330, seen from the bench

The Hamilton Frogman H77825330 is a professional diving tool watch born from military specifications in the 1990s. Featuring a 46mm stainless steel 316L case, unidirectional bezel, and high-contrast dial, it houses the Hamilton H-10 ND automatic movement with manual winding. The 22mm lug width accommodates robust straps while maintaining balanced proportions on the wrist, offering versatility for tactical and everyday use without requiring adapters.

Frequently asked questions

What is the lug width of the Hamilton Frogman H77825330?

The Hamilton Frogman H77825330 features a 22-millimetre lug width. This measurement is the standard for military-category tool watches and represents maximum versatility in terms of compatible artisanal strap availability.

Which strap is most suitable for the Hamilton Frogman H77825330?

The Frogman responds well to three categories: robust nylon NATO (ideal for tactical and aquatic use), vegetable-tanned calf leather (for those desiring patina and contained elegance), and vulcanised rubber (for resistance to chlorine and saltwater). Choice depends on use context and personal aesthetic philosophy.

How do you change the strap on the Frogman H77825330?

Strap change is a straightforward manual operation: remove the current strap by gently sliding the horizontal pins (or using an extraction tool if equipped with a deployante). Insert the new strap in the opposite sequence, ensuring the pin is fully seated in the case lug. No specialist tools required for standard operations.

Does a quality aftermarket strap exist for the Hamilton Frogman H77825330?

Yes. Milano Straps offers 22mm straps in full-grain Italian leather, eco-sustainable NATO, and certified FKM rubber. Each strap is crafted to guarantee precise tolerances with the Frogman's lugs, preserving the integrity of the original case and allowing complete reversibility without wear marks.

What is the lifespan of a leather strap on the Hamilton Frogman H77825330?

A full-grain leather strap with vegetable tanning, if subjected to ordinary maintenance (occasional cleaning, annual conditioning), maintains functionality and aesthetics for 3–5 years of intensive daily use. The patina it develops over time increases visual and tactile appeal. Humid or chlorinated environments shorten lifespan: in these cases, rubber or NATO represent more durable choices.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only