Strap for Seamaster Aqua Terra 150m Master Co-Axial 38.5 Red Gold / Grey / Bracelet

The <a href="/pages/termine-glossario/misura-ansa">lug width</a> of the Omega Aqua Terra 231.50.39.21.06.003 is 20mm. This width is standard for Aqua Terra models in 38.5mm and is compatible with all straps and bracelets designed for this category of medium wrist watches. Always verify attachment measurements before purchase.

For an Aqua Terra in Red Gold, straps in black or dark brown <a href="/pages/termine-glossario/alligatore">alligator</a> represent the most balanced choice, as they dialogue elegantly with the warmth of the rose metal without competing visually. Alternatively, excellent calf leather with <a href="/pages/termine-glossario/concia-vegetale">vegetable tanning</a> offers natural patina over time. For more sporty use, gray or navy rubber maintains the nautical versatility of the timepiece.

The Aqua Terra 231.50.39.21.06.003 is equipped with integrated lugs, which means the bracelet is welded to the case and cannot be removed with standard tools. The alternative strap must be threaded through the lugs, just like a purpose-built bracelet. For replacement or customization operations, we recommend contacting the Casati Milano atelier, which has specialized equipment to handle this architecture without risking damage.

All straps and bracelets with <a href="/pages/termine-glossario/misura-ansa">lug width</a> 20mm are compatible with the Omega Aqua Terra 231.50.39.21.06.003. At Milano Straps you will find a curated selection of straps in leather, rubber and technical materials, designed to fit perfectly with the case proportions. For personalized pairings with leather choice and stitching details, the Casati Milano atelier creates custom-made straps.

The lifespan of a leather strap depends on frequency of use, climate and leather type. A strap made with high-quality <a href="/pages/termine-glossario/shell-cordovan">shell cordovan</a> or alligator can last 4–6 years with moderate daily use and regular maintenance (gentle cleaning and drying). More delicate leathers require rotation with other straps to extend useful life. Casati Milano artisanal straps include an 18-month warranty.