Hamilton · Jazzmaster

Strap for Jazzmaster Open Heart 42 Rose Gold / Black

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
ReferenceH32735731
FamilyJazzmaster
MovementHamilton caliber H-10 ND hours, minutes, seconds
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 Jazzmaster H32735731

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Jazzmaster H32735731, seen from the bench

The Hamilton Jazzmaster H32735731 is a 42mm stainless steel chronograph equipped with the Hamilton caliber H-10 ND movement. This model combines American heritage with Swiss precision, featuring a dial with clear indices and high-contrast hands. The 22mm lug width accommodates standard aftermarket straps, making it suitable for customization. Built for everyday wear, it offers water resistance and solid construction typical of Hamilton's design philosophy.

Frequently asked questions

What is the lug width of the Hamilton Jazzmaster H32735731?

The lug width of the Hamilton Jazzmaster H32735731 is 22mm. This measurement represents the internal distance between the two metal lugs on the case where the strap attaches. To verify, measure the internal space between the lugs with callipers: a 22mm strap will fit perfectly, ensuring secure attachment without any mechanical play.

What strap is recommended for the Hamilton Jazzmaster H32735731?

The Hamilton Jazzmaster H32735731, with its 42mm proportions, accommodates multiple strap choices. Tuscan leather with vegetable tanning in brown or black emphasises the watch's formal and elegant character; alligator in deep shades represents the most sophisticated option; a grey slate or navy blue NATO strap imparts a sporty-casual character whilst maintaining stylistic coherence. Your choice depends on intended use and personal preference.

How do you change the strap on the Hamilton Jazzmaster H32735731?

To change the H32735731's strap, you require two tools: a spring bar tool (a small implement with a curved lever) and a flat work surface. Position the watch face-down, insert the tip of the spring bar tool into the small hole at the base of the lug, gently push to compress the internal spring, then extract the old strap. Repeat on the opposite side. To install the new 22mm strap, align the pass-throughs with the lugs, press until the spring clicks into place. Verify both sides are correctly locked.

Is an aftermarket strap compatible with the Hamilton Jazzmaster H32735731?

Yes, any aftermarket strap with a 22mm lug width is fully compatible with the H32735731. It is essential to verify that the measurement corresponds precisely to 22mm: a strap that is too narrow or too wide will create attachment problems. Milano Straps offers a complete collection of 22mm straps in various materials (leather, alligator, NATO fabric, rubber) specifically dimensioned for the Jazzmaster and other timepieces in the same category.

What is the lifespan of a leather strap for the Hamilton Jazzmaster H32735731?

The lifespan of a leather strap depends upon usage, maintenance and material quality. Quality Tuscan leather with vegetable tanning, worn occasionally and subjected to regular maintenance (drying after moisture contact, occasional treatment with natural balms), can last 4-7 years. Daily intensive use, prolonged exposure to humidity or direct sunlight reduces this window to 2-3 years. Alligator, being more robust, can exceed 10 years. NATO fabric or rubber straps exhibit greater resistance to wear and can last indefinitely if kept clean.

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