Strap for Constellation Master Chronometer 39 Stainless Steel / Sedna / Silver / Alligator

The lug width of the Omega Constellation 131.23.39.20.02.001 is 24 millimetres. This measurement represents the internal distance between the attachment pins on the case where the strap is fitted. It is important to measure this dimension precisely to ensure that the strap is fully compatible and fits correctly without excessive play or undersizing.

For this two-tone model in Sedna Gold and steel, the cognac brown alligator strap represents the finest choice, as it enhances the warm copper tone of the case through soft, warm contrast. Alternatively, a matte black calfskin offers elegance with contemporary neutrality, while dark grey rubber ensures sporting versatility while maintaining the perception of luxury. The choice depends on the primary use context: formal, professional or versatile.

To change the strap, it is necessary to remove the two attachment pins (lugs) from the case using a dedicated tool (spring bar tool). Position the tool under the pin, gently push outwards to release the internal spring, then extract the pin. Insert the new strap and reintroduce the pin in the same direction. This operation should be performed with extreme care to avoid damaging the case or the strap edges. If you lack experience, it is advisable to consult a specialised craftsman.

Yes, online you will find a wide selection of 24mm straps ready for shipment, customisable in sizes, initials and stitching thread. Additionally, the Casati Milano atelier offers bespoke creation services with personal choice of leathers, WhatsApp updates and 18-month warranty. Both standard solutions and bespoke services guarantee certified compatibility with this Omega reference.

A quality leather strap (alligator, calfskin, shell cordovan) worn regularly has an average lifespan of 3-5 years before requiring replacement. Lifespan varies depending on the type of leather, frequency of use, exposure to sun and humidity, and proper maintenance (avoid prolonged immersion and occasionally apply natural oils). Rubber straps generally last longer (5-7 years), while NATO fabric straps can be replaced very frequently at low cost.