Strap for Constellation Stainless Steel / Silver Silk / Strap

The lug width of the Constellation ST 168.0018 is 18 millimetres, measured from centre to centre between the lugs. This dimension is a specific construction feature of the model, determined by the integrated case design. It is essential to measure correctly by positioning a ruler perpendicularly between the attachments, completely ignoring the case, to ensure precise compatibility with any aftermarket strap.

For the Constellation ST 168.0018, alligator leather dyed in dark tones (black, chocolate brown, burgundy) represents the aesthetic choice most coherent with the model's sober and elegant language. Vegetable-tanned calf leather constitutes a more minimalist alternative, while premium shell cordovan balances robustness and refinement for formal contexts. Every material choice must respect the 18mm lug width.

Strap replacement requires access to the lug pins through specialised tools (spring bar tool or manual press). Position the watch on a soft support, locate the pins that pass through the lugs, then use a metal tool to gently push the pin out from one side. Once free, the original strap slides away. Insert the new strap into the case and reinsert the pin with precision, verifying that it protrudes evenly from both sides. If you are not experienced, a jeweller or professional Omega centre guarantees precision without risk to the case.

The lifespan of a leather strap depends on usage intensity and material quality. A premium alligator or shell cordovan strap, with correct vegetable tanning, typically lasts 3-5 years under normal daily wear conditions, developing a desirable patina over time. High-quality calf leather maintains functionality for 2-4 years. Constant exposure to humidity, sweat and sunlight significantly shortens lifespan. Preventive maintenance (gentle cleaning, drying, periodic conditioning) visibly extends longevity.

No, absolutely not. The Omega Constellation ST 168.0018 has a precise 18mm lug width. A 20mm strap is physically incompatible: it will not adhere properly to the case, generating unstable fitting and unacceptable lateral play. Dimensional precision is non-negotiable in horology. Always ensure 18mm compatibility before purchase, measuring your model directly if doubt persists.