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

The lug width is exactly 24mm. This dimension is specific to this model and represents the distance between the two lugs on the case. To verify it, use a digital caliper positioned perpendicularly between the lugs: the value should be 24.0mm ±0.2mm. A strap with a different lug width will not fit correctly.

Natural alligator leather with vegetable tanning is the choice most consistent with this watch's DNA. The texture of the grain and the natural patina that develops over time pair perfectly with the material duality of the case (stainless steel and yellow gold). Vegetable-tanned calf leather offers an equally noble alternative with a finer grain. For sports use, vulcanized synthetic rubber works synergistically with the water resistance capabilities.

The strap is changed by removing the spring bars that hold the strap to the case lugs. Use a specific tool (spring bar tool) inserted into the dedicated slot on the side of the bar: by pressing gently, the bar retracts and the strap detaches. Repeat the operation on the opposite side. The new 24mm strap is installed by reversing the procedure. If you are not experienced, consult a professional watchmaker to avoid damage.

Yes, you can use aftermarket straps with a 24mm lug width. Verify that the quality of the leather and the finishing of the buckle are consistent with the luxury level of the watch. Custom-made artisanal straps guarantee complete personalization: choice of leather, color, initials, stitching thread type, and buckle. Always acquire written guarantees on product durability (minimum 18 months).

A natural leather strap (alligator or vegetable-tanned calf) maintains structural and aesthetic integrity for 3-5 years with moderate daily use, increasing to 5-8 years with rotation among multiple straps. Longevity depends on exposure to moisture, sweat, and UV rays. Vegetable tanning develops a patina that improves appearance over time, but reduces resistance compared to synthetic tanning. To maximize durability, avoid prolonged contact with salt water and occasionally apply protective balms. High-quality artisanal straps guarantee greater resistance thanks to manual craftsmanship techniques and careful selection of leathers.