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

The lug width of the Seamaster Diver 300M 2453.80.00 is 20 mm. This measurement is essential for selecting compatible straps. Always measure between the two attachment pins, perpendicular to the case, using a digital caliper for maximum precision.

For the two-tone 2453.80.00, we recommend black moka vegetable-tanned alligator with gold-colored stitching, or the red bordeaux shell cordovan which amplifies the warmth of yellow gold. Dark brown calf leather with a steel deployante is the most versatile choice for elegant everyday wear.

Strap replacement requires a quality spring bar tool. Position the tool under the attachment pin, apply gentle lateral pressure until the pin retracts. Once removed, slide off the old strap and insert the new one, ensuring the pin clicks back into position. If you are unfamiliar with the process, contact a specialized craftsman such as Casati Milano.

Technically yes, since the pins have the same width. However, we recommend straps custom-made or specifically selected for the Seamaster: this ensures coherent geometry between the case (36.25 mm) and the lug width, avoiding unpleasant proportions. A high-quality artisanal strap also enhances your investment in the two-tone model.

A natural leather strap (alligator, shell cordovan, calf) has an estimated lifespan of 3 to 7 years with moderate use, depending on the material, frequency of use, and exposure to moisture. Shell cordovan tends to last longer thanks to its density. With <a href="/pages/terme-glossario/vegetable-tanning">vegetable tanning</a>, the leather also develops a fascinating patina over time. Casati Milano's 18-month warranty covers manufacturing defects and guarantees qualified repairs.