Strap for Constellation Master Chronometer 39 Yellow Gold / Silver / Alligator

The lug width of reference 131.53.39.20.02.002 is 24mm. To verify this, measure perpendicularly the internal distance between the two case lugs. This dimension ensures total compatibility with standard artisanal straps available online, without the need for adapters.

For a 39mm yellow gold like the 131.53.39.20.02.002, we recommend alligator in cognac or dark brown tones, which emphasizes the warm reflections of the case. Shell cordovan is excellent for those who desire a patina that will evolve visually over time. For more sporty versions, vegetable-tanned calf offers softness and personality.

Insert the flat end of a spring bar tool into the lug opening, gently compressing the internal spring. Once one side is released, extract the worn strap. Then insert the new strap by aligning the leather holes with the lug pins, verifying perfect engagement before releasing the spring. For yellow gold, we recommend professional service: a specialized atelier guarantees precision without scratches.

Yes. Artisanal straps with 24mm lug width are fully compatible. However, verify that the leather is of quality: genuine alligator, certified shell cordovan, or vegetable-tanned calf will guarantee durability and elegant aging. Avoid inexpensive universal-fit straps, which can compromise structural attachment.

A premium leather strap (alligator, cordovan, or calf) typically lasts 3-5 years with daily wear, extendable to 7+ years with moderate use and maintenance. Vegetable tanning develops patina over time, visually extending the aesthetic life. Humidity and heat accelerate wear: keep the watch in a dry environment and replace the strap at the first sign of structural failure to protect the lug pins.