Strap for Constellation Co-Axial 31 Stainless Steel / Yellow Gold / MOP

The lug width of the Constellation 123.20.31.20.05.002 is 20 mm. This measurement represents the distance between the two lugs of the case and is the technical parameter that determines compatibility with any aftermarket strap. To verify it, simply measure the horizontal space between the upper and lower lugs of the case.

For the Constellation 123.20.31.20.05.002 we primarily recommend alligator leather (black, cognac or burgundy) for its fine grain that perfectly matches the mother-of-pearl dial. Alternatively, vegetable-tanned calf leather offers natural aging and unique patina, while shell cordovan is the choice for collectors seeking maximum elegance. Avoid rubber and NATO fabric: they contradict the classic character of this watch.

The strap change is performed through the lugs of the case. Use a dedicated tool (spring bar tool) to compress the small spring inside each lug and slide out the spring bar. Next, insert the spring bar into the new strap and reinsert everything into the lug, allowing the spring to reposition itself. No precision tools are necessary for this operation, but it is advisable to perform it on a soft surface to prevent scratches to the case.

Yes, any strap with a 20 mm lug width is compatible with the Constellation 123.20.31.20.05.002. Milano Straps offers a curated selection of 20mm leather straps in natural leather and premium materials, all made according to construction standards that guarantee perfect coupling with the Omega case, both in terms of dimensions and aesthetics.

The durability of a leather strap depends on the raw material, daily use and maintenance. High-quality alligator typically lasts 3-5 years of intensive use. Vegetable-tanned calf can last 5-7 years because it develops protective patina. Shell cordovan is the most delicate (2-3 years if subjected to stress), but generates the most interesting aesthetic character over time. Milano Straps offers an 18-month warranty on all straps and recommends seasonal rotation to extend useful life.