Strap for Seamaster Planet Ocean 600M Co-Axial 45.5 Chronograph Stainless Steel / Orange / Rubber

The lug width of the 2918.50.82 is 22 millimetres. This measurement represents the internal distance between the two lugs of the case and is a technical standard that determines the compatibility of any strap with the model. The measurement must be taken from inside the case, not from the external diameter of the lugs.

The material depends on the intended use. For formal and professional contexts, a high-quality alligator strap or vegetable-tanned calf leather represents the most elegant choice. For intensive water use or saline environments, a vulcanised rubber or NATO 22mm fabric strap offers maximum resistance to moisture and salinity, preserving the technical character of the chronograph.

Changing the strap requires a spring bar tool, a specialized instrument that allows you to compress the internal spring of the lugs. Insert the tip of the spring bar tool into the opening of the lug, compress gently to loosen the spring, then extract the spring pin. Repeat the operation on the other side. Insert the new strap in the same sequence, ensuring that the spring is correctly positioned before releasing the pressure.

Yes, you can use certified quality aftermarket straps, provided they have a lug width of 22 millimetres. Artisan straps allow you to personalise the aesthetics of the watch while maintaining technical compatibility. Always ensure that the strap is made with robust lugs and that the springs are perfectly calibrated to prevent lateral movement.

The lifespan of a leather strap depends on the frequency of use and exposure to water and salinity. A well-maintained vegetable-tanned leather strap, used occasionally in water, can last 3-5 years. If the watch is intended for intensive water use, it is advisable to alternate leather straps with rubber or NATO options to extend the overall lifespan. Regular maintenance and drying after exposure to sea water significantly extend durability.