Strap for Constellation Co-Axial 27 Brushed Stainless Steel / Diamond / Black Stars

The lug width of the Constellation 123.15.27.20.01.001 is 18mm. This dimension, measured between the lugs, is fixed and not interchangeable. Compatible straps must be specifically made for 18mm lug width to ensure a correct fit without rubbing against the case.

Alligator in cognac or tobacco tones is the most elegant choice, as its fine grain texture dialogues with the minimalist architecture of the case and enhances the Sedna™ gold. Alternatively, vegetable-tanned calf leather offers a patina that develops over time, creating personal character. For a sporty-elegant style, a navy blue NATO strap remains versatile.

To change the strap on an 18mm lug watch, you must remove the spring bars using a specific tool: a change tool or a small flathead screwdriver. Position the tool under the spring bar, gently press inward to release the spring, extract the bar, insert the new bars into the new strap, and reinsert. If you prefer to avoid the risk of scratches, a professional watchmaker can complete the operation in a few minutes.

Yes, the Constellation accepts aftermarket straps provided they respect the 18mm lug width. However, given the reduced size, not all artisan brands offer this standard dimension. Milano Straps offers a specific collection of 18mm straps in alligator, calf, and technical materials, as well as custom manufacturing service at the Casati Milano atelier.

A quality leather strap, if made in alligator or vegetable-tanned calf, has an average lifespan of 3-5 years with daily wear. Longevity depends on exposure to moisture, sweat, and cleaning frequency. A strap custom-made at Casati Milano includes an 18-month warranty, covering manufacturing and material defects. After 3-4 years, reconditioning or replacement is recommended.