Strap for Constellation Co-Axial 27 Brushed Stainless Steel / Diamond / Grey Feather

The lug width of the Constellation ref. 123.15.27.20.56.001 is 18mm. This is the distance between the case lugs and determines compatibility with all straps and bracelets. Verify by measuring the space between the two lugs: they must be exactly 18mm apart to ensure a perfect fit without visible gaps.

It depends on daily use and personal sensitivity. Alligator is the classic choice to elevate elegance: the regular texture enhances the opalescent silver dial. Vegetable-tanned calf is ideal if you desire a patina that evolves over time. Technical fabric NATO ensures versatility and practicality. FKM rubber is recommended for humid climates or sporty use, maintaining grip and flexibility.

The change requires specific tools: a spring bar tool to extract the lugs from the case. Position the lever on the lug, gently press toward the center of the case to compress the internal spring, and the lug will slide out. Repeat on the other side, insert the new strap by aligning the holes with the lugs, and compress again until the lugs click into position. Never force: if the lug resists, check the alignment.

Yes, absolutely. A quality aftermarket strap with 18mm lug width is 100% compatible. In fact, choosing a custom strap allows you to adapt the watch to your aesthetics and daily uses. Milano Straps offers straps in alligator, vegetable-tanned calf, NATO and rubber, all created to guarantee precise tolerances and longevity superior to generic straps.

A quality leather strap (alligator or vegetable-tanned calf) typically lasts 3-5 years with daily wear, depending on humidity, sun exposure and care. Natural leather evolves and develops a patina, creating character, but will eventually wear out: the stitching thread detaches before the leather itself. Casati Milano offers an 18-month warranty on custom straps, and repair (re-stitching) costs less than a new strap.