Strap for Constellation Quartz 25.5 '95 Yellow Gold / Diamond / MOP

The lug width of the Constellation 1177.75.00 is 20 millimetres (ISO 20). This dimension is specific to this model and has been calculated by Omega in proportion to the case diameter of 25.5mm. Verify the measurement with a digital calliper by measuring the internal space between the two profiles of the lugs protruding from the case.

For formal elegance, we recommend African alligator or vegetable-tanned calf leather. For daily professional use, calf leather offers a balance between refinement and durability. If you desire versatility, a cotton NATO strap allows casual reinterpretations of the same watch. Shell cordovan is ideal for those seeking natural lustre without maintenance.

The Omega Constellation 1177.75.00 features an integrated fixed lug (non-removable). To change the strap, you must detach the keeper from the buckle or deployant clasp (if present) and manually slide the used strap from the lugs, then insert the new one following the reverse path. If you are not confident, consult a qualified watchmaker.

Yes, any strap with 20mm lug width (ISO 20) is compatible with the 1177.75.00. Always verify the width: narrower straps (18-19mm) will leave unwanted gaps, while wider straps (22mm+) will create visual disproportion. Online you will find a wide selection of <a href="https://milanostraps.it/collections/cinturini-orologi-per-misura-ansa-20mm">20mm straps</a> compatible with this model.

The lifespan of a leather strap depends on the material and usage. Alligator or shell cordovan with vegetable tanning guarantee 3-5 years with careful daily use and rotation with other straps. Calf leather is more vulnerable to moisture and mechanical damage, with a lifespan of around 2-3 years. Regular maintenance (application of protective balm every 6 months) significantly extends the strap's life.