Hamilton · Khaki Aviation

Strap for Khaki Aviation Pilot Pioneer Mechanical Chronograph Stainless Steel / Blue / Bracelet

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 straps All Hamilton

Lug width22 mm

Case diameter41 mm

ReferenceH76409140

FamilyKhaki Aviation

MovementHamilton caliber H-51-Si Hours, Minutes, Small Seconds | Chronograph

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 Khaki Aviation H76409140

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Khaki Aviation H76409140, seen from the bench

The Hamilton Khaki Aviation H76409140 is a mechanical chronograph with manual-wind Hamilton caliber H-51-Si movement, housed in a 41mm stainless steel 316L case. The watch features a three-counter chronograph layout and luminous indices on an anti-glare dial. This model has a 22mm lug width, a standard size for mid-sized sports chronographs. The watch maintains functional legibility without visual overload, combining professional tool design with historical aviation heritage dating back to 1942.

Frequently asked questions

What is the lug width of the Hamilton Khaki Aviation H76409140?

The lug width is 22mm. This measurement is essential when purchasing compatible straps. Measure the internal distance between the two case lugs to verify compatibility.

Which strap is best suited for the Hamilton Khaki Aviation H76409140?

Vegetable-tanned leather from Tuscany is the optimal choice: it develops a natural patina over time and offers flexibility perfectly suited to sports chronographs. Alternatively, NATO nylon straps provide superior resistance in humid environments and high-stress situations.

How do you change the strap on a Hamilton Khaki Aviation?

Use a dedicated spring bar tool. Insert the tip into the slot between the case and lug, then gently press to release the spring-loaded pin. Remove the old strap and insert the new one, ensuring the pin is fully locked.

Are aftermarket straps compatible with the H76409140?

Yes, provided they feature an exact 22mm lug width. Always verify the supplier's specifications, as many low-quality straps report incorrect tolerances that prevent proper mounting.

How long does a vegetable-tanned leather strap last?

Average lifespan is 3-5 years with daily wear, depending on ambient humidity and cleaning frequency. Vegetable-tanned leather develops a natural protective patina which, if maintained properly, extends the overall durability of the material.

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