Strap for Conquest Automatic 41mm Black Leather

The Longines Conquest L3.658.4.56.0 features a lug width of 21mm. This dimension is measured from the inner shoulder of one lug to the other, between the spring bars, and represents an intermediate size that does not appear in standard mass-market strap catalogues. Precision in measurement is essential: even minor errors will prevent correct strap installation.

For the Conquest L3.658.4.56.0, an alligator strap represents the highest level of sophistication, particularly in darker tones featuring vegetable tanning that develops a natural patina over time. Calf leather constitutes the most versatile alternative, supple and suited to daily wear. For authentic sporting use, a cotton-polyester NATO strap affirms the chronograph character of the watch without aesthetic compromise.

The Conquest strap is changed using a spring bar tool or small lever. Position the watch with the case facing downward on a soft surface. Insert the tool into the small hole present on the lug shoulder, aligned with the spring bar, and apply moderate pressure until the bar emerges. Repeat for the opposite lug. Installation of the new strap proceeds in reverse, ensuring the spring bar is fully seated.

Yes, any quality artisanal strap with 21mm lugs is compatible with the Conquest L3.658.4.56.0. It is essential to verify that the width is measured with precision: 21mm is an uncommon size, therefore we recommend checking technical specifications before purchase. Artisanal milanostraps.it straps are calibrated to this size and offer compatibility warranty.

The lifespan of a leather strap depends on frequency of use and construction quality. A calf or alligator strap of quality, worn daily, maintains functional integrity for 3–5 years before requiring replacement. Leather subject to vegetable tanning ages more gradually than industrial-tanned alternatives, developing patina rather than deterioration. Protecting the strap from moisture and direct sunlight exposure significantly extends its longevity. Artisanal Casati Milano straps carry an 18-month warranty against manufacturing defects.