Strap for Seamaster Aqua Terra 150M Co-Axial 38.5 Stainless Steel / MOP

The lug width is 19 millimetres. This measurement represents the distance between the two pins that attach the strap to the case. It is essential to verify this dimension before purchasing an aftermarket strap to ensure perfect compatibility and aesthetic harmony between the case and the strap itself.

For this variant with anthracite grey dial and white gold indices, we recommend alligator in dark tones (dark brown, black or cognac), honey shell cordovan for those who appreciate natural patina, or vegetable-tanned calf leather in hazelnut colour. For sporty contexts, a black Tropic rubber or a navy blue NATO offer high versatility. The choice depends on the primary use: formal settings suggest alligator or cordovan, daily wear recommends calf leather, summer requires rubber.

Strap replacement requires extraction of the pins from the lugs. Use a dedicated tool (springbar tool) or a pin removal tool: position the blade in the micro-groove present on one of the pins, gently push to compress the internal spring until the pin is released from its seat, then extract the strap. Repeat for the other side. The reverse operation (fitting the new strap) follows the same logic: insert the pins into the lugs and push them until they engage, verifying that the attachment is secure.

The Omega Aqua Terra 231.13.39.21.55.001 is compatible with any strap designed for a 19 millimetre lug width. Always verify that the strap is labelled for 19mm and that the thickness falls within the 1.2-2.0 millimetre range (the standard is 1.5mm). Avoid straps with excessive padding beneath the leather as they may appear visually disproportionate to the case; Milano Straps offers complete collections of straps specialised for this measurement.

Durability depends on leather quality, use and environment. Alligator and shell cordovan with vegetable tanning typically guarantee 4-7 years of daily wear before requiring replacement due to structural wear. Vegetable-tanned calf leather offers similar durability (4-5 years). Tropic rubber is more resistant to chemical wear and lasts 5-8 years. All these materials benefit from regular maintenance: gentle brushing and conditioning with specific products every 6-12 months significantly extends the strap's useful life.