Strap for Seamaster Aqua Terra 150M Co-Axial 38.5 Stainless Steel / Red Gold / Silver

The lug width is 20mm. This dimension represents the internal space between the threaded lugs of the case. To verify it accurately, use a digital caliper measuring from the center of one lug to the center of the other. No approximation is acceptable when replacing the strap.

The choice depends on the intended use. Alligator is ideal for formal settings, with vertical grain that creates contrast with the teak concept dial. Shell cordovan offers aging patina and cognac tones that resonate with the rose gold. For versatile daily wear, vegetable-tanned grained calf ensures breathability and durability. For casual-sport applications, a NATO in Cordura canvas maintains understated elegance.

The Omega Aqua Terra 231.23.39.21.52.001 features threaded lugs with integrated spring bars on the case. To remove the original strap, take out the pins with a specific tool (spring bar tool) working gently from the sides. New 20mm straps are inserted by sliding the pin into both attachments and ensuring it is properly seated. If unsure, consult a watchmaker to avoid damaging the case.

Yes, quality aftermarket straps with a 20mm lug width are perfectly compatible. Milano Straps offers customizable leather straps specifically tested for this lug width. Ensure that the strap has been made for straight 20mm lugs, not for alternative sizes or reducers, which could compromise alignment.

Longevity varies from 2 to 7 years depending on intensity of use, the leather chosen, and maintenance. Quality shell cordovan and alligator age developing fascinating patina, potentially lasting over 5 years with care. Grained calf typically lasts 2-4 years. Exposure to sweat, water, and chemicals accelerates wear. The 18-month warranty from Casati Milano covers manufacturing defects.