Strap for Seamaster Diver 300M Automatic 41 Stainless Steel / Black / Leather

The Omega Seamaster Diver 300M 2954.50.91 uses a lug width of 20mm. This width is specifically calibrated for the 41mm case diameter and ensures balanced proportions between the attachment space and the strap. Correct measurement means using a caliper between the two pins that secure the strap to the case lugs.

For this model we recommend alligator or calf for elegant daily wear, cotton NATO for heritage style, FKM rubber for diving activity. The choice depends on context: alligator adds sophistication without compromising sportiness, vegetable-tanned calf is the environmentally conscious choice, NATO maintains historical authenticity, rubber is infallible in saltwater.

The change requires a spring bar tool (a small double-lever implement). Insert the tips into the slots of the pins holding the strap, lift slightly to trigger the internal spring and release the pin. Repeat on the other side. Insert the new strap by threading one pin first, then the other, verifying they engage in the snap mechanism.

Yes, as long as the strap has a 20mm lug width. High-quality artisanal straps (alligator, calf, NATO) fit perfectly on the 2954.50.91, offering alternatives to the original Omega steel or rubber strap. Always verify that the strap lugs are proportioned to the case diameter.

A high-quality alligator or calf strap, with proper maintenance, lasts 3-5 years in daily use. Longevity depends on exposure to sweat, chlorine and saltwater. For the Seamaster Diver, we recommend avoiding prolonged immersions with a leather strap and choosing FKM rubber for diving activities. Casati Milano straps come with an 18-month guarantee and replacement support.