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

The lug width of the Constellation 123.15.27.20.03.001 is 14mm, measured from the inside of the terminal lugs on the case. This dimension is essential to ensure compatibility with any aftermarket strap. If your watch features an integrated bracelet, its removal typically requires specialist tooling or the assistance of a qualified watchmaker, as the bracelet is an integral structural component of the case.

For the 27mm Constellation, we recommend straps in premium alligator or calf leather, materials that enhance the satin-finished stainless steel case aesthetically. Alligator develops a golden patina over time and maintains a symmetrical grain that is particularly refined; calf leather offers greater versatility for daily wear and a softer feel against the wrist. For those seeking originality, shell cordovan is a rare and prestigious choice. NATO straps remain a valid alternative for sporting or informal contexts, whilst rubber models are ideal for humid climates or water-based activities.

If your Constellation features an integrated bracelet, strap replacement is a more complex procedure than on models with a standard lug attachment. We recommend consulting a specialist watchmaking atelier that can remove or adjust the bracelet whilst preserving the case's structural integrity. Alternatively, quick-change systems are available, though not always compatible with the precise proportions of this model. For entirely bespoke modification and personalisation, the Casati Milano atelier provides dedicated consultations with an 18-month warranty on work undertaken.

Yes, you may fit an aftermarket strap compatible with the 14mm lug width, provided the integrated bracelet has been removed or suitable adapters are available. Milano Straps' 14mm-width straps have been engineered to ensure both structural and aesthetic compatibility with Omega models of this calibre. Before purchase, confirm that your chosen strap is specifically designated for 14mm width and that hardware fittings are in stainless steel or titanium to prevent galvanic interaction.

The lifespan of a leather strap depends on the material, frequency of wear and environmental conditions. A premium alligator or vegetable-tanned calf strap, worn daily, has an expected lifespan of 4–7 years before requiring replacement due to natural wear. Leather develops a natural patina over time, conferring character and individuality, but remains vulnerable to scratching, prolonged rain exposure and humidity. Milano Straps' offerings are protected by an 18-month guarantee; thereafter, periodic maintenance (cleaning and leather conditioning) significantly extends the strap's serviceable life.