Strap for Seamaster Aqua Terra 150M Master Chronometer 41 Stainless Steel / Sedna Gold / Silver / Bracelet

The lug width of this model is 20 millimeters. This dimension corresponds to the internal distance between the case attachment pins. It is essential to measure it with precision using a digital caliper to ensure that the compatible strap does not create unwanted tension on the case lugs.

For this bi-material configuration, black alligator represents the established luxury choice, creating maximum chromatic contrast with the Sedna Gold. A sophisticated alternative is vegetable-tanned calf leather in dark brown tones (Havana), which creates a more subtle chromatic dialogue. For contexts with frequent water exposure, we recommend technical rubber or NATO fabric, accepting an aesthetic compromise in favor of practicality.

The strap is changed by removing the attachment pins through a dedicated spring located under the lugs. Use a small tool to extract the spring outward: the pin will come out easily. Replace it with the new strap, taking care to reinsert the pins in the same direction. If you are unsure, consult a professional to avoid damage to the case.

Yes, any strap with a certified 20mm lug width is compatible. However, we recommend verifying that the effective strap width (measured in the zone that inserts between the lugs) is consistent with the geometry of the concave original Omega lugs. Artisanal online straps or custom-made straps from ateliers such as Casati Milano guarantee this execution precision.

The lifespan depends on the material and usage conditions. An alligator or shell cordovan strap, with appropriate care (avoiding prolonged exposure to direct sunlight and excessive humidity), guarantees 3-5 years of daily use. A well-maintained vegetable-tanned calf strap reaches 4-6 years. Artisanal custom straps are supplied with an 18-month warranty, covering any stitching or finishing defects.