Strap for Seamaster Aqua Terra 150M Co-Axial 41.5 Stainless Steel / Silver

The lug width is 20mm. This width is the standard for Omega Seamaster Aqua Terra sports models of this generation. To verify strap compatibility, measure the distance between the horizontal pins on the case excluding the lug width itself, using a digital caliper.

It depends on use. For formal elegance: cognac alligator or dark brown vegetable-tanned calf with steel deployant. For everyday sportiness: black FKM rubber or grey-blue NATO strap. The alligator pairs beautifully with the teak deck dial, while rubber restores the nautical DNA of the watch.

Position the watch on a soft pad. Locate the horizontal pins at 12 and 6 o'clock that secure the strap to the case. Using a spring bar tool, gently press the pin downward to disengage it, remove it and replace the strap. Ensure the new strap has a lug width of exactly 20mm for insertion without forcing.

Yes. On milanostraps.it you will find a wide selection of 20mm straps ready for shipment, with options in alligator, calf, vegetable-tanned leather, NATO and rubber. All are customizable in sizes, initials and choice of stitching thread. The Casati Milano atelier also offers bespoke custom straps with direct consultation.

Durability depends on leather quality and use. An alligator or vegetable-tanned calf strap lasts 3-5 years with moderate use (5-6 days per week), developing attractive patina. With intensive use or constant exposure to water/sweat, replacement is recommended every 2-3 years. FKM rubber straps maintain elasticity for 4-6 years before requiring replacement.