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

The lug width is 20 mm. This measurement is specific to Omega's women's Constellation models and was developed to maintain harmonious proportions on small cases such as the 31 mm diameter of this reference. When purchasing an aftermarket strap, ensure that the lugs are precisely calibrated between 19.8 and 20.2 mm to guarantee optimal fit without excessive play.

For this model with mother-of-pearl dial and steel-gold case, vegetable-tanned alligator represents the choice most in line with the original aesthetic: the regular grain and natural texture create visual continuity with the mother-of-pearl. Alternatively, vegetable-tanned calf offers daily versatility, while shell cordovan is ideal for those who appreciate aged patina. For a sporty approach, a silk or cotton nato maintains formal character while keeping practicality.

Strap replacement is performed by removing the lug pins using a spring bar tool. Position the watch with the case facing downward, identify the small groove on the side of each lug, insert the tool to compress the internal spring and slide the pin outward. Once the lugs are freed, the old strap detaches easily. Insert the new strap by aligning the lugs to the holes and verify that the pins are fully inserted. If you lack experience, it is advisable to entrust the operation to a qualified watchmaker to avoid scratching the case.

Yes, provided the lug width is precisely 20 mm. Artisanal straps in alligator, calf, shell cordovan, or rubber are completely compatible with this reference, as long as the lugs respect the specified width. Avoid generic straps that may have non-calibrated construction tolerances: a lug that is too wide or too narrow compromises both the aesthetics and safety of the watch.

Durability depends on construction quality and use. An artisanal alligator or shell cordovan strap, subjected to ordinary maintenance (gentle cleaning, natural drying, semi-annual conditioning), can last 5-8 years before showing significant signs of wear. Calf has similar durability but is slightly more delicate at the edges. A vegan leather or rubber strap has shorter durability (3-5 years), but offers greater practicality. Prolonged exposure to humidity, perspiration, and heat sources accelerates aging: to extend life, remove the strap during more humid seasons.