Hamilton · Intra-Matic

Strap for Intra-Matic Chronograph H Stainless Steel / White

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

Lug width20 mm
Case diameter40 mm
ReferenceH38429710
FamilyIntra-Matic
MovementHamilton caliber H-51 hours, minutes, small seconds | date | Chronograph
Year2021
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 Intra-Matic H38429710

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Intra-Matic H38429710, seen from the bench

The Hamilton Intra-Matic is a chronograph that takes inspiration from the brand's designs of the 1960s. It is equipped with the Hamilton H-51 caliber with functions for hours, minutes, small seconds, date and chronograph. 20mm lugs complete the technical specifications of the model.

Frequently asked questions

What is the lug width of the Hamilton Intra-Matic H38429710?

The lug width of the Hamilton Intra-Matic H38429710 is 20 millimetres. This dimension is critical for strap compatibility and must be verified by removing the original strap and measuring the internal space between the two pins that fit into the case lugs. A strap of different width will not be compatible or will present compromised fit.

What type of strap is recommended for the Hamilton Intra-Matic H38429710?

The ideal strap depends on intended use. A strap in vegetable-tanned leather enhances the formal character of the watch and develops natural patina over time. A heavyweight canvas NATO introduces practicality for sporty contexts. Polished alligator is indicated for elegant occasions. Sport rubber guarantees breathability and protection during physical activities. All materials in 20mm width are compatible with the H38429710.

How do you change the strap on the Hamilton Intra-Matic H38429710?

Strap replacement requires a spring bar remover tool or a small flat screwdriver. Position the tool under the horizontal pin connecting the strap to the case lugs, apply gentle pressure to release the pin, then remove it completely. Repeat for the other side. Insert the new 20mm strap into the pins and snap the pins into the lugs. The procedure takes minutes and requires no specialist skills.

Is an aftermarket 20mm strap truly compatible with this Hamilton?

Yes, any strap with a 20mm lug width is compatible with the H38429710, provided that the inner and outer pin diameters comply with market standards. Quality artisanal straps, such as those offered by milanostraps.it, are manufactured to precise specifications and guarantee immediate compatibility without modifications to the watch case.

How long does a leather strap last on the Hamilton Intra-Matic H38429710?

The lifespan of a leather strap depends on frequency of wear, UV exposure, humidity, and tanning quality. A quality vegetable-tanned strap, worn daily, has an average life of 2-4 years before showing signs of wear such as tears or deterioration. However, aesthetic patina progresses continuously, rendering the strap increasingly appealing over time. Occasional lubrication and gentle cleaning extend its longevity.

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.

Request an appointment →

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