Strap for Constellation Co-Axial 27 Brushed Stainless Steel / Yellow Gold / Diamond / Tahiti MOP

The lug width of the Constellation 123.25.27.20.57.007 is 20 mm. This measurement is determined by the 27 mm case and is critical for purchasing a compatible aftermarket strap. To verify, measure with a caliper the internal distance between the two spring bars that support the strap, excluding the lugs themselves. An incorrect measurement can cause incompatibility and damage to the spring bars.

Alligator represents the ultimate solution for the Constellation, thanks to its natural grain that elegantly complements the gold and steel case. Calf leather is a refined and softer alternative, while heavy cotton NATO offers versatility. Rubber is not recommended for this elegant and formal model. The choice depends on daily use and personal aesthetic preference.

Changing the strap requires the use of a spring bar tool. Position the end of the tool in the small slot of the spring bar, gently lift the spring bar until it retracts, then remove the old strap. Insert the new strap by threading the spring bar through the lugs and allowing the return spring to lock it in place. Verify that the spring bar is fully inserted before wearing the watch.

Yes, any strap with a 20 mm lug width is compatible. The expert craftsmen of Milano Straps offer a collection of customizable 20mm leather straps in leather, color, length, and stitching details. The Casati Milano atelier can also create bespoke straps with personal leather selection and extended warranty.

The lifespan of a leather strap depends on daily use and material quality. High-quality alligator or calf leather, with vegetable tanning, generally resists 3-5 years of regular use before requiring replacement. Natural aging will add patina and character. Proper care – avoiding prolonged moisture and dirt – significantly extends durability. Casati Milano provides an 18-month warranty on its craftsmanship.