Strap for Constellation Co-Axial Master Chronometer 27 Stainless Steel / Silver Silk-Diamond

The lug width of this reference is 17mm. This measurement is critical when choosing an aftermarket strap: the strap must fit perfectly into the case lugs without protruding laterally. Always verify the measurement before purchase, as a strap that is too wide weighs down the wrist, while one that is too narrow compromises comfort and security.

The ideal strap depends on usage. For an elegant setting, polished dark brown alligator maintains optical proportions coherent with the brushed case. For daily use, vegetable-tanned calf leather ages with dignity, developing a rich patina. If you seek sportive versatility, a cotton-polyamide NATO or FKM rubber guarantee practicality without aesthetic compromise. A deployant clasp is strongly recommended for leather straps.

The strap is changed using a spring bar tool (also called a strap removal tool). Position yourself in a well-lit environment, insert the thin tip of the tool into the slot beneath the case lug to extract the spring bar. Once the lug is free, remove the old strap and insert the new one, repositioning the spring bar on the case ends. Verify that the strap is stable and does not move laterally.

Yes, any strap with a 17mm lug width is compatible with this reference. However, technical compatibility does not exhaust the aesthetic question: the quality of the leather, the color, and the type of clasp must be considered in relation to the elegant and refined character of the watch, otherwise the overall result loses visual coherence.

A quality leather strap (alligator, calf, shell cordovan) with vegetable or chrome tanning lasts on average 3–5 years with daily use. Longevity depends on the number of hours worn on the wrist, exposure to sun and humidity, and maintenance (avoid frequent wetting). The Constellation, being water-resistant to 100 meters, does not require the strap to be equally robust, but quality leather will age elegantly, developing patina and character.