Strap for Seamaster Aqua Terra 150m Master Co-Axial 41.5 Stainless Steel / Blue

The lug width of the Omega Aqua Terra 231.13.42.21.03.001 is 20mm. This measurement should be taken between the two internal case attachments using a digital caliper. It is essential to verify this measurement before purchasing an aftermarket strap to ensure proper mechanical and aesthetic compatibility.

Alligator leather is the natural choice for the 231.13.42.21.03.001, especially in cognac or tobacco brown tones. The granular texture of alligator visually harmonizes with the teak dial of the watch, creating aesthetic coherence. Alternatively, fine-grained calf leather in black or navy blue maintains versatility while preserving a more formal aesthetic.

Strap replacement requires a specific tool (spring bar tool). Position the watch securely, insert the tool into the slot next to the lug to compress the pin, gently remove the old strap, then install the new one by aligning both ends with the case attachments. Verify that the strap is properly secured before wearing the watch.

Yes, Milano Straps offers a complete collection of 20mm straps compatible with the 231.13.42.21.03.001, ready for shipping. It is also possible to customize straps in different sizes, initials, and stitching thread colors. For a complete artisanal experience, the Casati Milano atelier creates bespoke straps with personal consultation.

The lifespan of a leather strap depends on usage and maintenance. A high-quality artisanal alligator or calf strap, with proper care (drying after water contact, protection from direct heat sources), has a useful life of 3-5 years. Straps crafted by Casati Milano include an 18-month warranty against manufacturing defects and abnormal wear.