Strap for Speedmaster Co-Axial 38 Sedna Gold / Diamond / Silver / Strap

The lug width is 18mm, a specific measurement for this model that is not a commercial standard size. It represents the diameter of the pins where the strap is attached, and must be measured with precision using a digital caliper positioned perpendicularly to the pins themselves.

The best strap depends on use. For formal elegance: vegetable-tanned calf in black or watered alligator in warm tones. For sportiness: satin FKM rubber or NATO canvas. For chromatic matching with the red gold patina: grey-blue alligator or cognac calf. All must have 18mm lug width and a compatible deployant clasp.

Remove the original strap by inserting a spring bar tool into the spaces between the lug and the pin, pushing gently downward until the internal spring is released. The new 18mm strap is inserted by snapping the pins into their respective seats. If the strap has a deployant clasp, verify that the mechanism is smooth before use. For very stiff straps, expert assistance is recommended.

Yes, provided it respects the 18mm lug width. High-quality artisanal straps are compatible with any Omega that has the same lug width. Verify that the deployant clasp (if present) is constructed in robust stainless steel or Sedna Gold for consistency with the case. Ateliers such as Casati Milano create custom straps that respect the original pins and the watch's proportions.

A vegetable-tanned calf strap lasts 2-4 years with moderate daily use. Alligator tends to last longer (3-5 years) due to greater skin density. Longevity depends on ambient humidity, frequency of use, and care: regular cleaning with a dry damp cloth and protection with natural wax every 3-4 months significantly extends the useful life. An FKM rubber strap lasts 5-7 years.