Strap for Jazzmaster Open Heart 42 Stainless Steel / Black / Bracelet

The lug width of the Hamilton Jazzmaster H32705131 is 22 millimetres. This measurement is the internal space between the lugs of the case and is critical for compatibility with aftermarket straps. Any strap with a width less than or greater than 22mm will not fit correctly into the lugs.

For the H32705131, we recommend leather straps in calf or Tuscan vegetable-tanned hide in brown tones (tobacco, cognac, burgundy) to enhance the classic American aesthetic of the model. A grey-graphite NATO strap offers a sport-casual alternative whilst maintaining stylistic coherence. Alligator in medium brown elevates the model to an evening timepiece for collectors.

Obtain a spring bar removal tool (small forked implement). Position the tool on the extremities of the spring bar and gently press towards the centre of the case to release the spring. The spring bar will emerge; remove the old strap and insert the new one in the same manner, pushing the spring bar into its seats until it clicks into position.

Yes, provided the lug width is 22mm. Any artisanal or industrial strap with this measurement is compatible: Italian leather, NATO, rubber, alligator. Avoid 20mm or 24mm straps. We always recommend straps with quality spring bars (brushed or plated steel) and well-finished lugs.

A quality leather strap (calf, Tuscan, alligator) on an H32705131 worn 5-6 days per week lasts 4-7 years. Longevity depends on environmental humidity, maintenance care (annual conditioning with neutral creams), freshwater use and rotation frequency. The strap ages with dignified patina, but structural failure warrants replacement.