Strap for Seamaster Diver 300M Co-Axial 36.25 Stainless Steel / Blue/ Bracelet / Ceramic

The lug width is 20mm. This dimension represents the internal distance between the two attachment holes on the 36.25mm case. To measure correctly, use a digital caliper positioned perpendicularly between the lugs without forcing. A precision of ±0.5mm is essential to ensure a perfect strap fit.

Alligator in dark shades (chocolate brown, black) represents the most elegant pairing for occasional wear, offering natural patina and moisture resistance. For daily use, vegetable-tanned calf maintains versatility and ease of use. Vulcanized rubber remains the most authentic and sporty choice, consistent with the model's diving identity.

Strap replacement requires a spring bar tool to remove the elastic pins from the lugs. Position yourself in good lighting, gently push the pin upward with the tool to release only one end of the old strap, then remove it completely. Insert the new strap in the same manner, ensuring the pin clicks into position with a distinct click.

Yes, provided it is specifically catalogued for 20mm lug width. The <a href="https://milanostraps.it/collections/cinturini-orologi-per-misura-20mm">20mm straps</a> available on milanostraps.it have been tested for the Seamaster Diver 300M and similar models. Always verify that the declared width corresponds to your 20mm before ordering.

A quality handcrafted leather strap with vegetable tanning typically lasts 3-5 years with daily use and basic maintenance (protection from excessive moisture, periodic cleaning). Alligator tends to last longer thanks to the fiber structure. Casati Milano straps include an 18-month warranty and can be regenerated or resalted at the atelier by appointment.