Strap for Seamaster Master Co-Axial 39.5 Olympic Timekeeper Stainless Steel / Black / Yellow

The exact lug width is 20 millimeters, a specific dimension of this model that differs from the 22mm found on many other Seamaster Sport models. Always verify with a caliper from the inside of one lug to the other, in the horizontal direction, to avoid purchasing errors when selecting a replacement strap.

The choice depends on your use: blue alligator for daily elegance, vegetable-tanned calf in brown for natural aging and patina development, nylon NATO for water sports, FKM rubber for summer and frequent diving, bordeaux shell cordovan for tactile upgrade. All materials require 20mm lugs for perfect compatibility.

Position the watch on a soft cushion. Use a spring bar tool (thin lever device) to gently lift the pin that secures the strap to the lug, starting from the more accessible side. Extract the pin completely, remove the old strap, insert the new one by aligning the lug holes, and reinstall the pin with controlled pressure until you hear the locking click.

milanostraps.it offers artisanal straps handcrafted in Milan for tactile and constructive excellence, not original Omega. These straps in premium leathers and manual craftsmanship often exceed standard Omega OEM quality, with the possibility of bespoke customization through the Casati Milano atelier.

The typical lifespan of a quality leather strap is 3-5 years with daily wear, depending on the tanning method, frequency of water exposure, and maintenance. Superior shell cordovan or alligator straps can last 7-10 years if not continuously exposed to salt water. Rubber and synthetic NATO exceed 10 years. Monthly cleaning with a damp sponge and air drying significantly extends the life.