Strap for Seamaster Aqua Terra 150M Master Co-Axial 38.5 Stainless Steel / Yellow Gold / Champagne

The Omega Aqua Terra 231.20.39.21.08.001 has a lug width of 20mm. This measurement is essential for selecting a compatible strap: it represents the space between the two horizontal pins of the case where the strap is inserted. A 20mm strap ensures perfect fit without play or excessive tension.

The best choice depends on use: for sporty elegance, black or dark brown alligator emphasizes the nautical character; for daily versatility, vegetable-tanned calf that ages beautifully; for absolute luxury, wine-red shell cordovan that gains brilliance over the years. Models with yellow gold deployant clasps maintain the bimetallic coherence of the case.

The strap is secured by two horizontal pins. Using a spring bar tool, gently push the pin from below while holding the case firmly, causing the old strap to release. Insert the new strap (20mm) by aligning the vertical holes with the pins, then press until it clicks. The operation requires care to avoid scratching the case.

Yes, all straps with a 20mm lug width are compatible. It is important to verify the pin diameter (1.8mm on this model). Milano Straps are manufactured to Omega specifications and guarantee perfect compatibility with secure click and zero lateral movement.

An alligator or shell cordovan strap lasts 5-10 years with daily wear, thanks to fiber density. Quality calf reaches 3-5 years. Durability depends on sun exposure, humidity, and cleaning frequency. Casati Milano straps include an 18-month warranty and can be subjected to regeneration and restoration.