Hamilton · Jazzmaster

Strap for Jazzmaster Auto 40 Stainless Steel / Beige / Bracelet

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
ReferenceH32475120
FamilyJazzmaster
MovementHamilton caliber H-10 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 Jazzmaster H32475120

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Jazzmaster H32475120, seen from the bench

The Jazzmaster represents one of Hamilton's contemporary collections, characterized by elegant lines and essential functionality. It features the automatic caliber H-10 with indication of hours, minutes, seconds and date. The model has 20mm lugs for the strap.

Frequently asked questions

What is the lug width of the Hamilton Jazzmaster H32475120?

The lug width of the H32475120 is 20 millimetres. This measurement represents the distance between the two spring bar holes on the watch case and is essential for selecting a compatible strap. Do not confuse this with the overall visual width of the strap itself: 20mm is the mounting standard, whilst the rest depends on the thickness and profile the strap maker chooses for their design.

What is the best strap for the Hamilton Jazzmaster H32475120?

There is no single 'best' option—it depends on intended use and personal aesthetic preference. For formal occasions, alligator in tobacco or cognac tones harmonises beautifully with the brushed stainless steel case. For everyday sport-casual wear, a NATO in nylon or vegetable-tanned calf offers durability and develops character through natural patina. Vulcanised rubber provides compromise-free practicality. Your choice should dialogue with the dial colour of your specific model.

How do I change the strap on my Hamilton Jazzmaster H32475120?

The process is straightforward: obtain a spring bar tool (a forked implement with rounded tips) and position it beneath the spring bar, gently lifting one side whilst pressing the strap downward. The bar will release from the lug hole. Repeat on the opposite side. To install the new strap, position the spring bars into the lug holes and press firmly until you hear or feel a distinct click. Avoid pointed tools that might scratch the steel case.

Can I fit an aftermarket strap on a Hamilton Jazzmaster H32475120?

Yes, entirely. The H32475120 was designed with a standard 20mm lug width precisely to enable this personalisation. Any quality strap manufactured for 20mm lugs will be compatible. We recommend consulting experienced strap artisans who can guarantee precise tolerances on mounting holes and overall construction quality.

What is the lifespan of a leather strap on a Hamilton Jazzmaster H32475120?

Longevity depends on leather quality, climate and intensity of wear. A vegetable-tanned calf of good quality typically lasts 3–5 years under moderate use in temperate conditions. Alligator tends to last slightly longer (4–6 years) owing to its denser structure. In very humid climates, lifespan diminishes. Vulcanised rubber is more resilient and may serve 5–7 years. Regular maintenance—gentle cleaning and prompt drying after moisture exposure—substantially extends the working 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.

Request an appointment →

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