Strap for Constellation Master Chronometer 39 Sedna / Silver / Alligator

The lug width of this Constellation is exactly 24 millimetres, measured from outer pin to outer pin. This dimension is standard across the entire contemporary Constellation family and ensures compatibility with any 24mm aftermarket strap available on the market.

For a Constellation in Sedna Gold, we recommend cognac alligator to emphasize the warmth of rose gold, or shell cordovan in burgundy that develops a deep patina over time. For everyday use, dark brown calf leather or black FKM rubber ensure practicality while maintaining elegance. The style should reflect your intended use context: formal with alligator, versatile with calf, sporty with rubber.

The Constellation features an integrated bracelet, so the strap is not easily interchangeable by the owner. We recommend contacting a qualified watchmaker or luxury watch specialist for replacement, as it requires removing the lug pins with specialized equipment. The Casati Milano atelier offers custom assembly service with material consultation.

Yes, any strap with a 24mm lug width is mechanically compatible. However, we recommend verifying that the strap is designed for luxury watches with case thickness exceeding 12mm, so that visual proportions remain harmonious. Milano Straps' straps are specifically calibrated for models in this category.

A high-quality alligator or shell cordovan strap, subjected to vegetable tanning, can last 5-8 years with moderate daily use and regular maintenance (cleaning, drying, conditioning). The leather develops patina and character over time. With careful maintenance, it is possible to extend the life even beyond this period. The Casati Milano atelier offers an 18-month warranty and reconditioning services to extend durability.