Strap for Seamaster Diver 300M Master Co-Axial 42 Sedna Gold / Blue / Rubber

The Omega Seamaster Diver 300M reference 210.62.42.20.03.001 has a lug width of 20mm. This means the strap must be exactly 20mm wide between the spring bars to fit correctly onto the case lugs. Always measure the distance between the lugs before purchasing an aftermarket strap.

For Sedna Gold we recommend straps in alligator, shell cordovan, or vegetable-tanned calf leather. Black alligator offers maximum aesthetic contrast and highlights the brilliance of rose gold. Shell cordovan develops a patina over time that tonally complements Sedna Gold. Vegetable-tanned calf leather represents the ideal compromise between elegance and durability, especially for daily wear.

The strap is changed using a spring bar tool to gently push the elastic pins that pass through the lugs. Position the flat end of the tool under the pin, push gently inward to compress the internal spring, and the strap will release. Proceed with care to avoid scratching the case. Casati Milano offers a replacement service by appointment at the atelier.

Yes, provided the strap has a lug width of 20mm. All artisanal milanostraps.it straps with this width are compatible. Always verify exact dimensions and ensure the strap pins fit correctly into the Omega lugs without forcing.

A quality leather strap—alligator, shell cordovan, or vegetable-tanned calf—typically lasts 3-5 years with daily wear, depending on UV exposure, humidity, and perspiration. Alligator, being more resistant, tends to exceed 5 years. Casati Milano provides an 18-month warranty on all artisanal straps, with maintenance and reconditioning available by appointment.