Technical Archive

Hamilton
Jazzmaster H36125890— lug 20mm

Hamilton Jazzmaster H36125890: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Jazzmaster Performer Auto 34 Stainless Steel - Rose Gold / MOP

Artisanal Note

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

Technical Specifications

Hamilton H36125890
Lug Width
20 mm

The essential strap measurement.

Browse 20mm straps →
Reference

H36125890

Movement

Hamilton caliber H-10 ND Hours, Minutes, Seconds

The Heritage

The Hamilton Jazzmaster H36125890 is a 34 mm stainless steel watch continuing the design legacy of the 1958 Jazzmaster collection. It features a Hamilton caliber H-10 quartz movement with hour, minute, and second functions. The 20 mm lug width offers a refined proportion suited to slender wrists and ensures compatibility with various strap materials.

FAQ

What is the exact lug width of the Hamilton Jazzmaster H36125890?

The lug width of the H36125890 is precisely 20 mm. This measurement is taken between the inner surfaces of the lugs—the metal ears connecting the case to the strap. This specific dimension is relatively uncommon in contemporary watches, lending the Jazzmaster an elegant vintage-leaning proportion and excellent versatility in strap pairings.

What is the best strap for the Hamilton Jazzmaster H36125890?

There is no single 'best' strap, but rather informed choices based on context and aesthetic intent. For formal, timeless elegance, we recommend full-grain leather in cognac or deep brown. For sporty versatility, a NATO fabric strap in charcoal grey or navy blue. For technical sophistication, vulcanised rubber in matte black. The optimal choice reflects your personal style and the environments in which you wear the watch.

How do I change the strap on the H36125890?

Use a spring bar tool to remove the elastic pins (spring bars) securing the strap to the case lugs. Position the tool's tip under the lug, gently compress the spring, and slide the strap outward. Exercise care to avoid scratching the case. Reverse the process with your new 20 mm strap, ensuring both spring bars are fully seated and secure.

Can I use an aftermarket strap compatible with the H36125890?

Absolutely. Any strap with a 20 mm lug width is mechanically compatible with the H36125890. High-quality artisanal straps—crafted from vegetable-tanned leather, alligator, or technical rubber—frequently offer superior aesthetics and longevity compared to OEM alternatives, whilst enabling personalisation and rotation according to occasion.

How long does a leather strap last on the Jazzmaster H36125890?

Lifespan depends on material, tanning method, and wear frequency. Full-grain vegetable-tanned leather, worn daily, maintains structural integrity and visual appeal for 3–5 years, developing a rich patina. Shell cordovan or alligator straps may exceed 7–10 years. Exposure to perspiration, humidity, and UV accelerates ageing. Proper maintenance—periodic gentle cleaning and protective treatments—significantly extends strap life.