Strap for 29er Chronograph Black / Bracelet

The lug width of the M1-25-43-MB is precisely 20.00 mm. This measurement represents the internal distance between the case lugs where the strap attaches. Always verify this specification before purchasing an aftermarket strap to ensure proper fit.

For the 29er, we recommend alligator with vegetable tanning (for formal elegance), box calf or Hermès calf (for longevity and natural patina development), synthetic silk NATO (for sporting versatility), or FKM rubber (for durability and summer comfort). Choice depends on intended use and personal aesthetic preference.

Strap replacement is accomplished via spring bars connecting the lugs to the case. Using a dedicated spring bar tool, depress the internal ball mechanism, pull outward, and the strap detaches. This operation requires care to avoid case scratching.

Yes, any strap with 20mm lug width is mechanically compatible. We recommend selecting straps with superior construction quality: our artisanal collection and Casati Milano bespoke pieces guarantee lasting durability and refined finishing compared to economical alternatives.

A quality leather strap—alligator, box calf, or shell cordovan—typically lasts 3-5 years with daily wear, developing character and patina over time. Longevity depends on climate exposure, frequency of use, and maintenance: avoiding prolonged immersion and periodically conditioning with quality balms significantly extends lifespan.