Strap for Seamaster Aqua Terra 150M Co-Axial 43 Annual Calendar Stainless Steel / Blue

The lug width of the Omega Aqua Terra 231.13.43.22.03.002 is 21mm. It is measured from the base of one lug to the other, at the holes where the strap is inserted. Any strap intended for this model must have a lug width of exactly 21mm to guarantee correct and stable interfacing with the case.

The choice depends on use: a French Mississippi or Nile alligator, with natural patina that develops over time, enhances the elegance of the steel case and satin dial. For a more casual option, a fluoroelastomeric (FKM) rubber strap respects the amphibious vocation of the Aqua Terra, while vegetable-tanned calf leather offers a neutral and versatile chromatic base. A NATO fabric strap in Cordura nylon with double warp thread is ideal for daily sporting use.

To change the strap, you need to use a tapered spring bar tool or a dedicated instrument. Insert the cone into the lug hole to gently push the lateral pin outward: the strap will be released. Operate with care to avoid scratching the case. The reverse process secures the new strap by aligning the holes and reinserting the pin with a decisive movement. If you are not experienced, the strap change service at Casati Milano guarantees precision and case protection.

Yes, any strap with a 21mm lug width is compatible with the Omega Aqua Terra 231.13.43.22.03.002. The artisanal straps available on milanostraps.it are constructed according to high-quality specifications and customizable in sizes, colorways, initials, and thread color. Their aesthetic and tactile superiority over standard OEM aftermarket straps lies in the carefully considered choice of leathers (French alligator, shell cordovan, vegetable-tanned calf) and tailored craftsmanship.

The lifespan of a leather strap depends on frequency of use and exposure conditions. A quality alligator or shell cordovan strap, with vegetable tanning and patinated finish, maintains structural integrity for 3-5 years of regular use. Continuous exposure to direct sunlight and ambient humidity accelerates aging. Casati Milano straps supplied with an 18-month warranty can be serviced or replaced at no cost beyond the first year, ensuring longevity through preventive maintenance.