Strap for Seamaster Aqua Terra 150M Co-Axial 30 Stainless Steel / Yellow Gold / Diamond / MOP / Bracelet

The Omega Aqua Terra 231.25.30.20.55.002 has a lug width of 20mm. This measurement represents the internal distance between the two lugs of the case and is the fundamental parameter for selecting a compatible strap. You can verify it by placing a caliper on the lugs themselves, without considering the external width of the case.

For a mother-of-pearl dial, we recommend black or cognac alligator with a yellow gold deployant clasp: it enhances the luminosity of the mother-of-pearl without visually weighing down the wrist. A tobacco calf is the versatile alternative for those wearing the watch daily, while a blue NATO strap echoes the nautical theme of the Aqua Terra line without competing chromatically.

To change the strap, you need a specific tool to extract the spring bars (spring bar tool). Position the watch in a dedicated holder, insert the tool into the small lateral slot of the lug, push gently downward to release the internal spring, and slide the lug out. Repeat on the other side and insert the new strap by aligning the holes with the lugs. If you prefer to avoid any risk, entrust the task to our Casati Milano atelier.

Absolutely yes. A quality artisanal alligator or calf aftermarket strap can further elevate the aesthetic and tactile experience of the Aqua Terra, provided it strictly respects the 20mm lug width and is crafted with finishes coherent with the value of the watch. Verify that the strap has no lateral play in the lugs and that the stitching is even.

A quality alligator or calf strap, with regular maintenance (periodic cleaning and conditioning), typically lasts 3–5 years of daily use. Exposure to sunlight, heat, and humidity accelerates aging. The Casati Milano atelier offers an 18-month warranty on custom straps and can provide specific maintenance advice to extend their useful life.