Strap for Constellation Co-Axial 31 White Gold / Snow / Diamond Supernova

The lug width is 20mm. This specification is determined by the geometry of the 31mm case and must be verified with a digital caliper at the midpoint of the attachment points. No tolerance is acceptable: exactly 20mm ensures correct fit without visual play.

Alligator is the most natural choice for this Constellation: the regular texture and fine grain dialogue perfectly with polished white gold. Sophisticated alternatives are vegetable-tanned calf leather (which develops patina over time) and shell cordovan (maximum durability and natural brilliance). For those preferring absolute formal versatility, black alligator is timeless.

Use a pointed spring bar tool to gently press the internal spring of the attachment points. Work on a soft surface (leather or cotton pad) to avoid scratches to the white gold. Remove the strap by applying constant, controlled pressure, never forcing it. Installation of the new strap follows the same principle in reverse, ensuring the spring is completely inserted.

Yes, provided the lug width is certified 20mm and the strap is made using professional construction techniques (double stitching, edge finishing, well-calibrated attachment points). Artisanal straps from Milano Straps guarantee full compatibility with customized construction and subsequent adjustments.

A well-maintained alligator or shell cordovan strap lasts 4-7 years with daily wear. Vegetable-tanned calf leather tends toward 3-5 years due to lower fiber density. Longevity depends on perspiration, sun exposure, and periodic maintenance (cleaning with soft cloths, light conditioning). Casati Milano's 18-month warranty covers construction defects and abnormal deterioration.