Strap for Constellation Manhattan 29 Co-Axial Master Chronometer Sedna Gold / Blue - Diamond

The lug width of this model is 18mm. This measurement is taken internally between the two lugs of the case, perpendicularly. It is essential to measure it correctly to avoid ordering incompatible straps. The internal strap passage must be shaped to accommodate the curved lugs of the model, which feature a slight angle of approximately 8-10 degrees.

For this Sedna Gold case, an alligator in cognac or dark tobacco tones represents the most refined choice, creating a natural chromatic dialogue with the rose-gold alloy. Alternatively, vegetable-tanned calf leather with an aged finish develops natural patina over time. For a sporty-elegant option, anthracite rubber ensures versatility without weighing down the compact wrist presence.

The lugs are fully removable. Obtain a spring bar tool (a tool with a flat tip), position the tip in the hole of the spring inside the lug, gently lift until the spring is freed from its housing. Remove the old strap by sliding it out of the metal tube. Reinsert the new strap by passing the internal metal tube through the lug, then reposition the spring in its housing. A specialized atelier can perform the operation without risk to the case.

Any strap with an 18mm lug width is technically compatible. However, we recommend verifying that the depth of the strap passage is adequate for the lug geometry of this model. For guaranteed compatibility and aesthetic customization, milanostraps.it offers 18mm straps ready to ship or fully custom-made through the Casati Milano atelier with personal leather selection.

A high-quality alligator or calf strap with vegetable tanning has an average lifespan of 3-5 years with daily wear, depending on exposure to water, sweat, and humidity. Shell Cordovan straps can last over 7 years. The Casati Milano warranty on artisanal straps is 18 months. Proper maintenance (drying after water contact, occasional nourishing treatments) significantly extends the longevity of the material.