Strap for Seamaster Aqua Terra 150M Co-Axial 43 GMT Chronograph Stainless Steel / Grey

The lug width is 20mm. This measurement was chosen by Omega to ensure optimal proportions with the 43mm case: substantial enough to visually balance the thickness without excessive mass. Measure your watch with a digital caliper between the inner shoulders of both lugs to confirm compatibility before ordering a strap.

Shell cordovan in dark shades (black or brown) creates the most refined colour contrast, thanks to its crystalline surface that reflects light. Navy blue alligator offers elegant tonal harmony. For versatility, vegetable-tanned calf leather in deep burgundy dialogues sophisticatedly with the dial blue, creating tonal depth without monotony.

Use a spring bar tool specifically designed for watches: insert the tip into the lug slot, gently lift the internal spring, and slide out the old strap. Throughout the operation, always support the watch with your other hand to avoid asymmetrical pressure on the case. If you own a deployant, verify that the width corresponds to your 20mm lug width before installation.

Yes, provided the lug width is 20mm. Any 20mm strap fits the case regardless of material (alligator, cordovan, calf) or brand. We recommend verifying that the pins/bars have the correct gauge (typically 1.1-1.2mm diameter for Omega).

A superior quality leather strap (alligator, cordovan, vegetable-tanned calf) lasts 3-5 years in daily use, with variability dependent on climate, body moisture, and cleaning frequency. Natural patina develops gradually. NATO fabric straps resist wear longer (5-10 years) since they don't suffer from desiccation. Regular maintenance with specific creams significantly extends longevity.