Strap for Seamaster Master Co-Axial 39.5 Olympic Timekeeper Stainless Steel / White / Blue

The lug width of the Omega Seamaster 522.32.40.20.04.001 is 20mm. This width is specific to this 39.50mm model and must be verified with a digital caliper positioned between the two lugs of the case. An error in measurement would result in incompatibility with the strap.

The ideal strap depends on the dial: for the blue model, we recommend medium brown vegetable-tanned calf or black alligator; for the grey dial, slate grey calf or anthracite alligator. Shell cordovan represents the premium option for those who appreciate natural patina over time. For sports use, a natural fabric NATO strap maintains the diving vocation.

Use a dedicated spring bar tool with gentle movement, pushing from one side to compress the internal spring. Extract the pin completely before removing the strap. Insert the new strap by aligning the holes with the lugs, then reinsert the pin ensuring it is perfectly positioned. If uncertain, consulting a professional is advisable to preserve the lugs.

Yes, any strap with 20mm lug width is compatible with reference 522.32.40.20.04.001, regardless of brand. Be sure to verify the lug width before purchase. Many quality artisanal straps in alligator, calf, and shell cordovan offer better aesthetics and comfort compared to original Omega straps while maintaining full mechanical compatibility.

A quality leather strap (alligator, calf, shell cordovan) lasts an average of 3-5 years with daily use in a marine environment, as saltwater and humidity accelerate aging. Vegetable tanning offers better resistance than synthetic tanning. To maximize durability, dry the strap after each immersion and apply natural conditioners every 6 months. For those who frequently immerse the Seamaster, a rubber or synthetic NATO strap is the practical recommended choice.