Omega
Constellation 131.30.41.21.99.003— lug 18mm

The lug width of the Constellation 131.30.41.21.99.003 is 18 millimetres. This measurement is taken precisely between the attachment lugs: position a ruler across the lugs to verify compatibility before purchasing an aftermarket strap.

There is no single choice, but rather contextual ones. African alligator is the ultimate formal solution with its understated elegance; Italian calf leather with vegetable tanning offers daily versatility and noble patina over time; a butadiene rubber strap emphasises the model's sporting heritage. It all depends on your personal style and wardrobe pairings.

Use a spring bar tool specifically designed for watches: insert the forked tip under the lug pin to release the spring, remove the old strap, then position the new one by aligning the holes and press until you hear a click of retention. If you are uncertain, consult a professional watchmaker to avoid damage to the case.

Yes, provided it is certified for 18 mm lug width. However, construction quality and finishes vary considerably among manufacturers. Straps in genuine alligator, Italian calf leather and Japanese Shell Cordovan guarantee longevity and aesthetics that match the value of the Omega.

Durability depends on material, frequency of use and care. Genuine alligator or Shell Cordovan guarantees 3–5 years of daily wear; Italian calf leather with vegetable tanning, 2–4 years with progressive patina. Prolonged exposure to sweat, water and UV rays accelerates ageing; rotate between multiple straps to extend their useful life.