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

The exact lug width is 20mm. This measurement is essential to preserve the visual proportions of the 36.25mm case and ensure wrist comfort. Any strap must be fitted with standard-length spring bars compatible with 20mm: always measure with a digital caliper the internal distance between the two attachment holes on the case.

Alligator in dark brown or cognac tones represents the luxury choice: the natural grain creates depth without competing with the gold surface. For those seeking natural patina, vegetable-tanned calf leather offers aesthetic transformation over time. Alternatively, navy blue silk NATO combines functionality and chromatic versatility, maintaining visual coherence with the case.

The change requires a spring bar tool and two replacement spring bars. Position the watch on a soft surface, insert the flat tip of the tool under the spring bar from the obverse side, gently push until the internal spring releases and extract. Repeat on the other side. Insert the new strap by aligning the spring bars with the case lugs and press until the spring clicks into place. Verify solidity before use.

Yes, all straps with 20mm lug width are compatible from a mechanical standpoint. We recommend, however, privileging specialized brands that guarantee precise tolerances (±0.1mm) to avoid friction on the gold case. Always check the width certification before purchase and verify that the supplier specifies compatibility with your Omega model.

A quality alligator or calf strap with vegetable tanning and professional stitching maintains structural integrity for 24-36 months with proper maintenance (avoid prolonged perspiration, treat with natural leather conditioner biannually). Aesthetic aging occurs more rapidly: visible patina after 3-4 months. Rubber and NATO offer superior durability (3-4 years), with deterioration less gradual but predictable.