Omega
Seamaster Diver 300M 210.30.42.20.04.002— lug 20mm

The lug width is 20mm. This measurement is standard for the 210.30.42.20.04.002 model and is essential to ensure complete compatibility with the strap. It is not possible to use lugs of different sizes without compromising stability and wearing comfort.

Alligator is the most versatile choice: it offers water resistance, regular grain, and lasting elegance. For those who love patina and the passage of time, vegetable-tanned calf leather is ideal. For intensive water use, NATO fabric or FKM rubber ensure total impermeability and zero maintenance.

The model uses standard spring bars on the 20mm lugs. Using a dedicated tool (spring bar tool), gently press toward the center of the spring to release it from the lug, then remove the used strap. Insert the new strap by aligning it with the lugs and release the spring. If you prefer to avoid manual operations, contact the Casati Milano atelier for professional strap replacement.

Yes, any strap with a 20mm lug width is compatible. We recommend verifying the exact width before purchase by contacting the supplier. The artisanal straps from milanostraps.it are specifically tested for the 210.30.42.20.04.002 and are shipped ready to use.

The lifespan depends on the material (alligator, calf, shell cordovan) and exposure to fresh water. A vegetable-tanned alligator strap typically lasts 3-5 years of daily use before requiring replacement or restoration. Frequent exposure to fresh water reduces durability; the Casati Milano atelier guarantees 18 months on its bespoke straps, with the option to renew.