Strap for Constellation Co-Axial 35 Stainless Steel / Lozenge Blue

The lug width of the Constellation 123.10.35.20.03.002 is 22 millimetres. This dimension represents the distance between the two lugs of the case where the strap attaches. It is a critical measurement to ensure strap compatibility: even a half-millimetre error would result in an unstable fit. To verify correctly, use a digital calliper and measure the width of the space between the lugs in a straight line from the bracelet or strap side.

The ideal strap depends on the intended use. For formal contexts, dark brown alligator with ivory stitching represents the most refined and classic choice. Vegetable-tanned calf is perfect if you desire a strap that ages beautifully, developing patina over time. If you seek versatility without compromise between elegance and practicality, choose a Japanese shell cordovan or Dupont cotton NATO. Finally, for those who do not compromise between style and practicality, a technical FKM rubber with titanium deployant clasp offers resistance in any context.

To change the strap on the Constellation, it is necessary to remove the lugs from the case. The procedure requires a specific tool called a spring bar tool, which allows you to compress the internal springs of the lugs. Position the tool in the small hole under the lug, gently compress until the spring gives way, then remove the strap. Repeat from the opposite side. When installing the new strap, insert one lug at a time ensuring that the spring clicks firmly into place. If you prefer not to perform the operation yourself, contact an Omega service centre or a competent watchmaker.

The lifespan of a leather strap depends on the quality of the leather, frequency of use and care. A quality alligator or shell cordovan strap, worn daily, generally offers a lifespan of 4-7 years before requiring replacement. Vegetable-tanned calf, being more absorbent, may require more frequent reconditioning but still lasts 3-5 years. Leather tends to lose elasticity and develop cracks over time, especially if exposed to moisture and intense sunlight. Proper maintenance—allowing the strap to dry if wet, avoiding prolonged sun exposure and occasionally applying a protective balm—significantly extends the strap's lifespan.