Strap for Seamaster Diver 300M Automatic 41 Stainless Steel / White Gold / Black / Leather / America's Cup

The lug width is 20mm. This is the distance between the two lugs of the case where the strap is inserted. Any 20mm strap is compatible with this model, while different sizes (18mm or 22mm) will not fit properly.

For this white gold and steel model, we recommend a black alligator in vegetable tanning, which creates an elegant dialogue with the precious metals. Alternatively, a shell cordovan in burgundy tones or grey aniline calf amplify the sophistication. If you use the watch for actual diving, a natural rubber strap is the most practical and durable choice.

The Seamaster Diver 300M is equipped with standard spring bar lugs. To change the strap: 1) Place the watch on a soft surface; 2) Use a spring bar tool to gently push the lug pin; 3) Remove the old strap; 4) Align the new strap to the lugs and insert the pin until you hear a click. Repeat for both sides. Avoid forcing to prevent damage to the lugs.

Yes, any 20mm strap is compatible. We recommend quality artisan straps that respect the nobility of the case materials (white gold and 904L steel). Materials such as alligator, shell cordovan and aniline calf maintain aesthetic balance. Ensure the strap is specifically designed for 20mm lugs and that the width is consistent with the case diameter (41mm).

The durability varies based on material and use. An alligator or shell cordovan in vegetable tanning, with moderate use (5-6 days per week, environments not exposed to extreme climates), lasts 4-6 years. Aniline calf, more delicate, lasts 2-4 years if frequently exposed to moisture. A natural rubber or NBR strap lasts 8-12 years even with intensive use. The standard artisan warranty is 18 months.