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Hamilton · Khaki Field

Strap for Khaki Field Titanium Auto 42 / Grey

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

20mm
20 mm strapsAll Hamilton
Lug width20 mm
Case diameter42 mm
ReferenceH70545550
FamilyKhaki Field
MovementHamilton caliber H-10 ND hours, minutes, seconds
Year2020
CaseTitanium

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 Field H70545550

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Khaki Field H70545550, seen from the bench

The Hamilton Khaki Field H70545550 is a 42mm titanium field chronograph with a black matte dial, skeletonized hands, and applied indices. It features the proprietary H-10 automatic movement with 80 hours of power reserve and -4/+6 seconds per day precision certified by COSC. The grade 5 titanium case is water-resistant to 10 ATM with a 20mm lug width, an uncommon specification reflecting the watch's military heritage. This instrument prioritizes functionality over aesthetics with no superfluous details.

Frequently asked questions

What is the lug width of the Hamilton Khaki Field H70545550?

The lug width (spring bar distance) of the Hamilton Khaki Field H70545550 is 20mm. This uncommon specification reflects the original military design heritage. Measure accurately by positioning a soft ruler perpendicular to the spring bars that traverse the case lugs.

What is the best strap for the Hamilton Khaki Field H70545550?

For the Khaki Field, we recommend vegetable-tanned leather straps (calf, alligator) for an elegant-tactical aesthetic, or Cordura NATO fabric for emphasising military heritage. FKM rubber is ideal for aquatic sports. Avoid polished straps: natural patina completes the instrument's character.

How do I change the strap on the Hamilton Khaki Field H70545550?

Remove the old strap by gently pushing inward the spring bar pins using a spring bar tool. Align the new strap's holes with the pins and insert them until you hear a click. Verify that both bars are secure before wearing the watch.

Which aftermarket straps are compatible with the H70545550 model?

Any strap with a 20mm lug width is compatible. MilanoStraps offers a complete range in leather, NATO, and rubber for this specific size. Ensure the strap features appropriate spring bars (standard 1.8mm diameter) and verify visual alignment with the case lugs.

How long does a natural leather strap last on a field watch like the Khaki Field?

A vegetable-tanned leather strap on a moderately-to-intensively used field watch lasts 3–5 years before requiring replacement or reconditioning. Exposure to moisture, perspiration, and temperature fluctuations accelerates ageing. Pronounced patina indicates use, not wear. With regular maintenance (application of specific balms), longevity extends considerably.

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