Strap for Seamaster Diver 300M Automatic 41 Stainless Steel / Yellow Gold / Black / Bracelet

The lug width is 20 mm. You can verify it by measuring the distance between the spring bars with a digital caliper. This is the standard width for all straps compatible with this model.

It depends on your use and style. Black or dark brown alligator offers classic elegance; shell cordovan develops an extraordinary patina; vegetable-tanned calf provides breathability and organic aging; FKM rubber is ideal for actual diving. For a bi-color Seamaster, we recommend black alligator or chocolate brown with satin metal deployant.

Remove the current strap by sliding out the side spring bars with a spring bar tool or a rounded toothpick. Position the new strap by aligning the holes with the spring bars, then reinsert the bars. Verify that the strap is perfectly centered on the case. If you are not confident, entrust it to a professional watchmaker or contact the Casati Milano atelier.

All straps with a 20 mm lug width are compatible. Milanostraps.it offers a complete collection of artisanal straps in alligator, shell cordovan, calf, and rubber, all customizable. Every strap is tested for structural compatibility with the Omega case.

The lifespan varies by material and use. Alligator with vegetable tanning lasts 3-5 years with average wear; shell cordovan reaches 5-7 years thanks to skin density; calf lasts 2-4 years. Aging is part of the aesthetic. Casati Milano offers an 18-month warranty on every custom strap and support for maintenance and replacement.