Strap for Constellation Quartz 24 Brushed Stainless Steel / Diamond / MOP

The lug width is 18mm. This is the internal distance between the two pins that held the original bracelet. To verify, remove the caseback or measure directly the distance between the lugs: 18mm is the correct measurement to ensure mechanical and aesthetic compatibility with any replacement strap.

For the Constellation 123.15.24.60.55.001, we recommend black or dark brown alligator, or burgundy shell cordovan. Both respect the jeweled character of the case and create a natural visual balance with the gilt indices. Vegetable-tanned calf leather remains a reliable daily-wear option. Avoid sport straps (NATO, rubber) that contrast with the refinement of the design.

To change the strap, obtain a spring bar tool (small dedicated instrument). Position the watch on a stable surface, insert the tip of the spring bar tool into one of the lug holes, gently press to release the pin at one end, then remove the strap. Repeat on the other side. To fit the new strap, align the pins to the lugs and press until you hear the closing click. If you are unsure, entrust the task to a professional.

Yes, provided they have an 18mm lug width. All 18mm straps are mechanically compatible. We recommend choosing noble materials (alligator, shell cordovan, vegetable-tanned calf) to maintain aesthetic coherence with the jeweled architecture of the Constellation. Avoid generic brands or synthetic materials that could compromise the elegance of the timepiece.

A high-quality artisanal leather strap, with proper maintenance, typically lasts 3-5 years of daily wear. Alligator and shell cordovan, being noble and dense leathers, tend to last longer. Calf leather is more vulnerable to atmospheric agents but develops a fascinating patina. The 18-month warranty offered by Casati Milano covers manufacturing defects, but natural wear falls within the physiological lifespan of leather.