Strap for Seamaster Aqua Terra 150M Master Co-Axial 38.5 Titanium / White / Bracelet / GoodPlanet

The lug width of the Omega Aqua Terra 231.90.39.21.04.001 is 20mm. This measurement must be respected exactly for the correct installation of an aftermarket strap. By measuring with a caliper between the two lugs of the case, you will obtain a 20mm perpendicular distance, corresponding to the width your new strap must have at the attachment points.

There is no "best" strap in absolute terms, but the choice depends on your use. For everyday elegance, a grey alligator or burgundy calf enhance the titanium without aesthetic overload. For nautical performance, a quality rubber resists salt water and offers superior grip. For versatility, a natural calf in neutral tones adapts to different contexts. Consult our collection of 20mm straps to evaluate textures and colors.

The change is simple: position the watch with the dial facing downward. Use a spring bar tool (a small steel instrument with a curved tip) to gently push the elastic pin (spring bar) that supports your current strap, leveraging toward the center of the case. Once released, the old strap detaches. Insert the new strap into the lug holes, then use the tool to compress the elastic pin and snap it into position. If you do not own the tool, the Casati Milano atelier can perform the change by appointment.

Yes, absolutely. Your watch accepts any quality strap with 20mm lug width. Artisanal straps in leather, rubber or fine fabric do not affect the international Omega warranty and often enhance everyday use experience compared to the integrated bracelet. Make sure to choose reliable brands that guarantee authentic leather and solid stitching.

Durability depends on the material, frequency of use and care. An alligator or quality calf, worn daily with moderate water contact, maintains structural and aesthetic integrity for 3-5 years. If exposed to prolonged direct sunlight, profuse perspiration or frequent salt water, the patina ages more rapidly (12-24 months of optimal appearance). Rubber lasts longer but tends to degrade after 4-6 years of intense use. Artisanal ateliers such as Casati Milano offer an 18-month warranty and can perform maintenance work (re-stitching, re-coloring) to extend the life of your strap.