Strap for Seamaster Diver 300M Master Co-Axial 42 Sedna Gold / White / Rubber

The lug width of this model is exactly 20 millimetres. This width is specific to the spring bar attachments on the Seamaster 300M case in this configuration and is the only safe compatible measurement for proper mounting of an aftermarket strap.

For this rose gold variant, the following are recommended: black or dark brown alligator for elegant occasions; tobacco-coloured vegetable calf for a sophisticated look and natural aging; black or grey FKM rubber for maximum practicality in aquatic environments. Navy blue NATO represents a versatile sporty alternative.

The procedure requires the use of a spring bar tool to compress the fixing springs inside the lugs. Gently position the tool under the spring, push inward and slide laterally to release the worn strap. Reverse the process to install the new strap, ensuring that the springs lock correctly in their respective seats.

Yes. Any strap with a 20mm lug width is compatible with this model. On milanostraps.it customizable straps are available in alligator, calf, shell cordovan, NATO and rubber, specifically chosen to enhance the Sedna Gold and the aesthetics of the Seamaster Diver 300M.

The lifespan of a leather strap depends on the frequency of water exposure and ambient humidity. With predominantly dry use, a quality strap (alligator, vegetable calf, shell cordovan) lasts 3-5 years before requiring replacement. With frequent exposure to salt or chlorinated water, rubber or NATO is preferable to extend the strap's useful life.