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

The lug width of this model is 21mm. This is a width that requires specific straps, not compatible with standard 20mm or 22mm sizes. Always verify the case reference (231.13.43.22.01.002) before purchase to avoid errors.

For a sporty 43mm watch like the Aqua Terra, we recommend structured vegetable-tanned leather or alligator with satin finish. These materials offer durability, develop patina over time, and provide elegance without compromise. For frequent water use, FKM rubber or synthetic NATO fabric are functional alternatives.

Lug width is measured using a digital caliper, measuring the narrowest part of the lug where it inserts into the case lugs. For the Omega Aqua Terra 231.13.43.22.01.002, the measurement should be 21mm. We recommend not relying on visual estimates.

All straps with 21mm lug width are compatible. In our catalog you will find vegetable-tanned leather, alligator, shell cordovan, rubber, and NATO options. Always verify the compatibility of the buckle or deployant with the attachment system of your case.

A quality artisanal vegetable-tanned leather strap lasts an average of 3-5 years under normal daily use conditions. Durability depends on frequency of use, moisture exposure, and maintenance. Premium leathers such as alligator or shell cordovan can exceed 7 years. Casati Milano's warranty covers 18 months.