Strap for Seamaster Aqua Terra 150M Master Chronometer 43 Worldtimer Sedna Gold / Silver / Bracelet

The lug width of the Omega Aqua Terra 220.50.43.22.02.001 is 21mm. This lug-to-lug spacing has been engineered for this 43mm Sedna Gold case configuration and requires straps with a precisely 21mm lug width. An incorrect measurement would result in unsightly gaps between the lugs and strap.

For the Sedna Gold of this Aqua Terra we recommend brown or black <a href="/pages/termine-glossario/alligatore">alligator</a> leather, or vegetable-tanned calf. Alligator emphasizes the golden tone of the 18-karat rose gold and develops a patina that dialogues with Sedna. Alternatively, a burgundy <a href="/pages/termine-glossario/shell-cordovan">shell cordovan</a> creates elegant contrast. For nautical use, a 21mm NATO canvas in beige or dark blue completes the Seamaster heritage without functional compromise.

The Aqua Terra 220.50.43.22.02.001 features fixed lugs (not quick-release) of 21mm width. Procure two non-abrasive spring bar tools: position them on the small springs beneath each lug, apply lateral pressure to release the spring, then slide the old strap off the lugs. Insert the new 21mm strap by aligning the holes with the lugs, reposition the springs. Avoid sharp tools that could scratch the Sedna Gold.

All commercially available <a href="https://milanostraps.it/collections/cinturini-orologi-per-misura-ansa-21mm">21mm straps</a> are compatible with the fixed lugs of the 220.50.43.22.02.001. On milanostraps.it you will find dedicated selections: full-grain leather, <a href="/pages/termine-glossario/concia-vegetale">vegetable tanning</a>, rubber for wet environments, NATO fabric. Each strap can be customized in length, initials and stitching thread. The Casati Milano atelier also offers bespoke consulting for custom straps with personally selected leather.

A natural leather strap on a watch like the 220.50.43.22.02.001, if subjected to daily use, has an average durability of 24-36 months. Factors that accelerate wear: humidity, perspiration, direct sun exposure, excessive flexing. A strap in <a href="/pages/termine-glossario/shell-cordovan">shell cordovan</a> or vegetable-tanned <a href="/pages/termine-glossario/alligatore">alligator</a> can reach 4-5 years if properly maintained (monthly cleaning, storage in dry environment). The standard Casati Milano warranty on artisanal straps is 18 months with the possibility of restoration.