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

The lug width is 20mm. It is measured by extracting the lug from its seat and verifying the internal distance between the shoulder terminals. An incorrectly sized strap creates mechanical stress on the lugs and reduces watch longevity.

Alligator offers formal elegance and complements the two-tone case. Shell cordovan, with vegetable tanning, introduces natural patina over time. Ballistic nylon NATO provides sporting versatility. The choice depends on use: formal wear requires alligator, daily wear prefers calf or NATO.

Extract the lugs using a dedicated tool (or a flat knife tip). Position the new strap, aligning the terminals with the seats. Reinsert the lugs with firm pressure until they click into place. Verify that the strap is securely fastened before wearing the watch.

Yes, provided the strap has a certified 20mm lug width. Quality artisanal straps, such as those with certified alligator or shell cordovan, are fully compatible and increase the watch's versatility without compromising durability.

A quality leather strap (alligator, calf, or shell cordovan) lasts 3–5 years with daily wear, decreasing if frequently exposed to marine moisture. Vegetable tanning and leather density determine longevity. Regular maintenance (drying after immersion) extends strap life to 7–8 years.