Strap for HMS1

The lug width of the 1LCAW.S03A.C111W is 20mm. This measurement represents the internal distance between the lugs where the strap is fitted. Accurate lug width measurement is essential to ensure optimal fit and comfortable wear on the wrist.

For the Royal Collection, we recommend a dark brown alligator strap or vegetable-tanned calf leather, materials that age gracefully and complement the white gold case beautifully. A contemporary alternative is a NATO strap in neutral tones (navy, grey, black). All 20mm solutions are available on milanostraps.it, customisable online.

Changing the strap requires a spring bar tool and a proper watchmaker's workbench. Position the watch with the lug facing upward, gently insert the screwdriver into the spring bar slot, apply light downward pressure to release the spring, then remove the old strap. Insert the new strap ensuring both sides of the spring clip correctly into place.

Yes, any 20mm-lug strap is fully compatible with the 1LCAW.S03A.C111W. milanostraps.it artisanal straps, handcrafted in Italy with premium materials (alligator, calf, shell cordovan, NATO), are perfectly suitable and add personality to your watch without compromising its build integrity.

A quality leather strap (alligator or vegetable-tanned calf) typically lasts 3–5 years with daily use, longer if alternated with other straps. Longevity depends on frequency of use, moisture exposure, and maintenance (keep dry, avoid salt water). Natural leather develops a patina that becomes increasingly beautiful over time—a quality that rewards investment in artisanal craftsmanship.