Strap for Constellation Co-Axial 27 Brushed Stainless Steel / Red Gold / Diamond / MOP Supernova

The lug width of the Constellation 123.25.27.20.55.001 is exactly 18mm. This standard width for the Omega women's segment is easily measured by positioning a caliper between the two case lugs. Any compatible strap must have an 18mm width to ensure perfect and proportional fit.

Alligator remains the most coherent choice for the character of the 123.25.27.20.55.001: exotic leather with regular grain, natural patina, and structural softness. Vegetable-tanned calf is also excellent (organic aging), shell cordovan for those who accept pronounced patina, and storm grey for sober modernity. For evening wear, glossy black with rose gold deployante.

The change requires a spring bar tool (dedicated tool for the spring). Position the watch with the strap facing upward, insert the tool into the small hole under the lug, gently press to compress the internal spring, and the metal bar releases from the seats. Flip for the other attachment. Proceed in reverse with the new strap, ensuring the spring is completely positioned in the seats. If inexperienced, consult an expert: damage to the seats is costly.

Yes, provided the lug width is exactly 18mm and the attachments are compatible with the case seats. Quality aftermarket straps preserve the aesthetic proportions of the Constellation and often offer superior materials (genuine alligator, certified vegetable tanning). Avoid generic straps below 18mm: they would create visual gaps and structural instability.

A genuine alligator or vegetable-tanned calf strap, with moderate daily use and maintenance (annual hydration, humidity protection), lasts 5-7 years. Shell cordovan can reach 8-10 years thanks to natural regeneration. Critical factors: prolonged sun exposure, frequent perspiration, and lack of cleaning significantly reduce durability. Milano Straps guarantees 18 months on all Casati Milano straps.