Strap for Seamaster Aqua Terra 150M Co-Axial 44 Chronograph Stainless Steel / Grey

The lug width of the Omega Aqua Terra 231.13.44.50.06.001 is exactly 20mm. This measurement corresponds to the distance between the lateral case lugs and is critical for ensuring perfect fit with any aftermarket strap. You can verify it by measuring directly with a digital caliper after removing the installed strap.

For this model we primarily recommend natural alligator, which creates visual resonance with the horizontal dial lines. Excellent alternatives are vegetable-tanned calf leather (which develops an extraordinary patina over time) and FKM rubber straps for authentic nautical use. For summer contexts, satin cotton NATO textile straps maintain aesthetic lightness without compromising elegance.

To change the strap without risk: position the watch on a soft pad with the case facing upward, locate the lateral lugs, use a dedicated spring bar tool or a small diamond tip to gently push the longitudinal pin, and remove the old strap. Insert the new strap in the same position and reinsert the pin. If you are not experienced, entrust it to a certified watchmaker or to Casati Milano's service.

A quality 20mm strap is fully compatible with the Omega Aqua Terra 231.13.44.50.06.001, provided it has been constructed respecting the width specification. All straps in the Milano Straps collection for the 20mm size are tested and certified compatible with this reference; the Casati Milano atelier furthermore customizes bespoke solutions, eliminating any margin of error.

The lifespan of a leather strap depends on construction quality and use. A high-end alligator or calf leather strap, subjected to occasional sports wear, maintains structural integrity for 4-6 years. Constant exposure to salt water or intense perspiration reduces this period to 2-3 years. FKM rubber straps guarantee superior durability (8+ years) if subjected to periodic maintenance. Casati Milano offers an 18-month warranty on all bespoke straps.