Strap for Seamaster Diver 300M Automatic 36.25 Stainless Steel / Yellow Gold / Black / Bracelet

The lug width is 20mm. This is measured as the internal distance from one lug to the other. Omega specifies this dimension in the original technical documentation, and it is the essential parameter for compatibility with any aftermarket strap.

It depends on use and context. For urban elegance, an alligator or shell cordovan in cognac or brown tones. For genuine marine robustness, a Tropic rubber or navy blue NATO strap. For formal sophistication, vegetable-tanned calf leather in black or burgundy.

The strap is replaced by removing the deployant (the integrated clasp) from the lugs. Omega generally uses a pin or screw system. It is recommended to use a dedicated tool (spring bar tool) and follow the official Omega guide, or contact an authorized service center or specialized atelier.

Yes. A 20mm strap made from noble materials (alligator, shell cordovan, calf leather) and crafted by a specialized artisan does not compromise the watch's authenticity and enhances its aesthetic versatility. Dimensional compatibility ensures proper positioning between the lugs.

A natural leather strap typically lasts 18-36 months depending on use, care, and moisture exposure. For a watch with marine vocation, it is recommended to alternate the leather strap with rubber or fabric alternatives, and to subject the leather to regular maintenance (cleaning, drying, conditioning).