Hamilton · Khaki Navy

Strap for BeLOWZERO 200m Auto

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

Lug width22 mm
Case diameter42 mm
ReferenceH78555333
FamilyKhaki Navy
MovementETA caliber 2824-2 Hours, Minutes, Seconds | Date
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

Straps for the Khaki Navy H78555333

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Khaki Navy H78555333, seen from the bench

The Hamilton Khaki Navy H78555333 is a 42mm stainless steel (AISI 316L) dive watch featuring a 22mm lug width and an ETA 2824-2 automatic movement with date window. The movement operates at 28,800 vibrations per hour with approximately 40 hours of power reserve. The watch maintains military heritage through its highly legible dial with luminescent baton indices and anti-reflective sapphire crystal, designed for readability in low-light conditions. Originally developed from Hamilton's WWII naval chronometer tradition, this contemporary tool watch combines precision engineering with everyday wearability.

Frequently asked questions

What is the exact lug width of the Hamilton Khaki Navy H78555333?

The lug width of the H78555333 is 22mm. This measurement corresponds to the internal distance between the two spring bar attachments on the case. To verify this precisely, use a digital calliper or millimetre ruler positioned perpendicularly between the lugs, measuring the internal distance. A 22mm strap fits perfectly between these points, engaging securely with the integrated spring mechanism.

Which strap do you recommend for the Khaki Navy H78555333?

It depends on your intended use and personal style. For authentic military aesthetics, we recommend a NATO strap in saturated nylon (navy blue, dark grey, black). For sophisticated elegance, an alligator in vegetable-tanned leather—Havana brown tone—creates striking contrast with the grey-blue dial. For absolute technical practicality, black FKM rubber ensures complete water resistance and consistent grip indefinitely. Aniline calf leather in whisky develops a beautiful natural patina over time, ideal if you appreciate leather ageing.

How do I change the strap on my Hamilton Khaki Navy?

Use a spring bar tool (a specific tool for removing spring bar attachments). Position the hook of the tool in one of the lateral gaps between the lug and the case, applying light pressure to compress the spring. When you feel it click, extract the spring bar. Repeat on the other side. To install your new 22mm strap, thread one end of the spring bar through the strap's hole, then gently compress the spring whilst positioning the other end into the second hole. Verify the strap sits centred on the case.

Can I use aftermarket straps compatible with the H78555333?

Absolutely. The H78555333 accepts any 22mm aftermarket strap, provided the construction quality matches the case's solidity. Check that the strap has a thickness between 3–4mm (depending on material) and that the spring bar is stainless steel. Our handcrafted straps for 22mm lug width are specifically tested on Hamilton Khaki Navy models, guaranteeing perfect fit and durability.

How long does a leather strap last on the Khaki Navy?

Longevity depends on leather type and usage frequency. Vegetable-tanned alligator typically lasts 4–6 years under moderate daily wear (avoiding constant dirt exposure and prolonged humidity). Aniline calf lasts 3–5 years, developing a beautiful patina that is part of its charm. FKM rubber has potentially unlimited durability, though grip may slightly diminish after 8–10 years of intense sun exposure. Nylon NATO lasts 5–7 years before fibres begin fraying. Regular maintenance—periodic cleaning and conditioning leather with natural balm—significantly extends the life of any strap.

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