Strap for Seamaster Aqua Terra 150M Master Co-Axial 38.5 Titanium / White / GoodPlanet

The Omega Aqua Terra in reference 231.92.39.21.04.001 has a lug width of 20 millimeters. This dimension is the space between the pins that anchor the strap to the case lugs. To verify compatibility, physically measure with a digital caliper the gap where the strap inserts, perpendicular from the bottom of the case.

Dark-toned alligator (chocolate brown, ebony black) is the most noble aesthetic and constructive choice, as the natural grain texture dialogues with the sobriety of the titanium and teak dial. Alternatively, vegetable-tanned calf offers superior structural robustness and acquires elegant patina over time, while shell cordovan proposes dramatic aging toward burgundy tones after 1-2 years of wear.

The strap is changed by removing the pins that anchor it to the case lugs. Use a spring bar tool to compress the internal spring-pin and slide it horizontally out of the lug hole. The procedure is similar for all watches: verify that the pins of the new strap are 20mm long for this Aqua Terra configuration.

All straps made for 20mm lug width are compatible. On milanostraps.it you will find a wide selection in noble materials—alligator, calf, shell cordovan, NATO—customizable in dimensions, initials and thread color. The atelier Casati Milano also offers bespoke straps with direct consultation on leathers and 18-month warranty.

Durability depends on the material and use. Artisanal-quality alligator maintains structural integrity for 5-8 years with proper maintenance (periodic cleaning, annual conditioning). Vegetable-tanned calf, more robust, extends life to 6-10 years. Shell cordovan is the most durable, frequently exceeding a decade. Avoid prolonged exposure to unrinsed salt water, chlorine and continuous direct sunlight to maximize longevity.