Strap for Constellation Manhattan 29 Co-Axial Master Chronometer Stainless Steel / MOP / Diamond

The Omega Constellation 131.15.29.20.55.001 has a lug width of 18mm. This measurement is specific to the 29mm case model and is determined by the constructive proportions of the case. To measure correctly, position a digital caliper between the internal horizontal lugs of the case: the result must be exactly 18mm to ensure structural compatibility and harmonious aesthetic balance.

Genuine alligator remains the canonical choice thanks to its fine grain texture and noble patina that develops over time. For formal occasions, deep black creates maximum contrast with the silver dial. Valid alternatives are vegetable-tanned calf leather, which ages magnificently, or shell cordovan for those who accept a more reflective surface. For sports use, an FKM rubber strap maintains the water resistance of the case.

Strap replacement requires a spring bar removal tool to release the elastic springs positioned at the sides of the attachment lug. Position the flat tip of the tool in the groove of the pin, pushing downward to compress the internal spring; simultaneously, extract the pin with a slight rotation. Insert the new strap pins by executing the same operation in reverse. Verify that the strap is securely attached by pulling it firmly.

Yes, any strap with an 18mm lug width is compatible with the Constellation 131.15.29.20.55.001. Milanostraps.it offers a dedicated collection of 18mm straps, customizable in material (alligator, calf, cordovan), color and stitching thread. The Casati Milano atelier also creates custom straps with direct consultation on leathers and cutting patterns.

A genuine alligator strap lasts on average 4-6 years of daily use before requiring replacement, developing a patina appreciated by collectors within the first 18-24 months. Vegetable-tanned calf leather, being softer, has a similar lifespan but with an accelerated patina. Shell cordovan, naturally waterproof, can last up to 8-10 years if properly maintained. Durability depends on intensity of use, climate and care applied: avoid prolonged immersion in fresh water and clean the strap with dry soft cloths.