Technical Archive

Hamilton
Jazzmaster H42535640— lug 20mm

Hamilton Jazzmaster H42535640: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Jazzmaster Auto 40 Stainless Steel / Blue

Artisanal Note

"This model requires a precise 20mm lug width to preserve the original sartorial balance."

Technical Specifications

Hamilton H42535640
Lug Width
20 mm

The essential strap measurement.

Browse 20mm straps →
Reference

H42535640

Movement

Hamilton caliber H-10 ND Hours, Minutes, Seconds

The Heritage

The Jazzmaster represents one of Hamilton's contemporary collections with a classic design. It is powered by the H-10 automatic caliber with hour, minute and second indication. The watch features 20mm lug width for the strap.

FAQ

What is the lug width of the Hamilton Jazzmaster H42535640?

The Hamilton Jazzmaster H42535640 features a lug width of 20mm, meaning the distance between the two lugs protruding from the case is exactly 20mm. This is the standard measurement that ensures compatibility with the majority of aftermarket straps available on the market.

What is the best strap for the Hamilton Jazzmaster H42535640?

The best strap depends on your use case. For formal environments, we recommend an alligator strap in neutral tones (dark brown or black) or vegetable-tanned calf leather that ages over time. For daily and versatile use, a NATO in grey or a structured rubber strap offer practicality and remain coherent with the model's understated character.

How do I change the strap on the Hamilton Jazzmaster H42535640?

Strap replacement is performed via the spring bars located inside the lugs. Using a spring bar tool, you gently compress the spring on one side, then extract the old strap. Insert the new strap by positioning the holes first on one side, then the other, ensuring the spring bars click securely. The operation takes just a few minutes.

Can I use an aftermarket strap on my Jazzmaster H42535640?

Yes, any strap with a 20mm lug width is technically compatible with the H42535640. We recommend choosing materials and colours that respect the model's formal and understated character: alligator, vegetable-tanned calf, NATO, and rubber are the most suitable options for maintaining aesthetic coherence.

How long does a leather strap last on the Jazzmaster H42535640?

The lifespan of a leather strap depends on frequency of use, moisture exposure, and material quality. Quality vegetable-tanned calf typically lasts 3 to 5 years with daily wear, then develops a fascinating patina. Alligator, being more resistant, can reach 7–10 years. Rotating between multiple straps significantly extends their useful life.