Strap for Constellation Master Chronometer 39 Stainless Steel / Yellow Gold / Champagne-Diamond / Bracelet

The lug width is 24 millimetres. This measurement defines the internal space where the strap sits between the case lugs. It is essential to ensure compatibility and aesthetic proportion. Always verify by measuring from the base of the upper lug to the base of the lower lug.

Dark brown alligator is the classic choice to enhance this reference in formal contexts. Vegetable-tanned calf is the contemporary alternative for those who appreciate the patina that develops over time. For summer, a cotton NATO or an FKM rubber strap on a deployant clasp maintains the sporty character. Shell cordovan is ideal for enthusiasts seeking deep lustre and extreme durability.

The strap is changed using a specific tool to remove the lug pins (spring bar tool). Position yourself in front of a well-lit surface, locate the small lateral hole on the lug, insert the tool to compress the internal spring and slide the strap out of the lug. Repeat on the other side. Installation of the new strap proceeds in reverse. If you lack experience, consult a trusted watchmaker.

Yes, completely. Any strap equipped with 24 millimetre lug pins (spring bar) is compatible with this model. The straps offered by milanostraps.it in the 24mm size are tested to specific dimensional and construction standards to ensure optimal fit and security.

Durability depends on leather quality, frequency of use and environmental conditions. A quality artisanal alligator or calf strap, with regular maintenance (gentle cleaning, avoiding prolonged moisture), can last 3–5 years of daily wear. Shell cordovan is even more durable, up to 7–10 years. Constant sun and moisture exposure reduces service life. The 18-month warranty from Casati Milano covers manufacturing defects.