Strap for Seamaster Aqua Terra 150M Master Co-Axial 34 Sedna Gold / MOP / Bracelet

The lug width of this Omega Aqua Terra is 20mm. This is the distance measured between the center of one spring bar to the other, perpendicular to the case. To verify, position a digital caliper on the inner side of the lugs with the watch removed from the strap: the value will be 20mm. Only straps with this compatible width will mount correctly without forcing the case.

For this model in Sedna Gold we recommend dark brown or cognac alligator for maximum elegance, vegetable-tanned calf for versatility and evolving patina, or shell cordovan for durability with marked aesthetic character. The choice depends on use: premium leather for formal occasions, NATO or rubber for daily sports applications.

Remove the watch from your wrist. Locate the spring bars (spring bars) at the ends of the case: these are small metal levers that hold the strap in place. Use a dedicated tool or a small flat screwdriver to gently push the spring bar inward and simultaneously extract the strap. Insert the new 20mm strap by aligning the holes with the spring bars, then release. Proceed with care to avoid scratching the Sedna Gold case.

Yes, any strap with a 20mm lug width is physically compatible. However, construction quality varies considerably: poor-quality straps risk deteriorating rapidly and compromising the aesthetics of a watch of this caliber. We recommend specialized brands that control thickness, stitching, and keeper finishing.

A quality leather strap (alligator, calf, cordovan) typically lasts 2–4 years with moderate daily use, varying based on exposure to moisture, perspiration, and UV. Vegetable-tanned leather develops patina and improves aesthetically with aging, while alligator and cordovan maintain structure and luster longer. Proper care—drying after rain, avoiding prolonged soaking—significantly extends longevity.