Strap for Seamaster Aqua Terra 150M Co-Axial 38.5 Stainless Steel / Diamond / Black

The lug width of the Omega Aqua Terra 231.18.39.21.51.001 is 18mm. This means the strap must have a width of 18mm at the attachment point to the case. Incorrect measurement leads to mechanical incompatibility, so we recommend always verifying this specification before purchase.

For the Aqua Terra 231.18.39.21.51.001 we recommend: vegetable-tanned alligator for sustainable elegance, vegetable-tanned calf for everyday versatility with aging patina, cotton NATO for casual style, or FKM rubber for marine environments. The choice depends on primary use and personal aesthetic preferences.

Strap replacement occurs through the attachment pins (lugs) located on the sides of the case. Use a dedicated tool (spring bar tool) to slightly compress the internal spring of the pin, remove the old strap, then insert the new one by hooking it onto the case shoulders. If you are not experienced, we recommend having the operation performed by an authorized watchmaker.

Yes, all quality straps with 18mm lug width are compatible with the 231.18.39.21.51.001. Milano Straps offers online a wide selection of 18mm straps ready for shipment, customizable in sizes, initials and thread color, guaranteeing perfect mechanical compatibility.

A quality vegetable-tanned leather strap has an average lifespan of 3-5 years with daily use, extendable to 7-10 years with moderate use. Durability depends on: tanning quality, frequency of use, exposure to sun and humidity, and periodic maintenance. The Casati Milano atelier offers an 18-month warranty on custom-made straps.