Strap for Constellation Master Chronometer 36 Yellow Gold / Champagne / Bracelet

The lug width of the Constellation 131.50.36.20.08.001 is 22 millimetres. This measurement represents the distance between the case lugs and is essential for selecting a compatible strap. To verify it, measure horizontally between the outer lug attachments, avoiding measuring the strap itself.

For the Constellation in 18-carat yellow gold, we recommend a white or pearl grey alligator for maximum formal elegance, or a cognac brown calf leather from vegetable tanning that enhances the warmth of the metal. For daily use, vegetable-tanned calf develops an authentic patina and reveals a visible history over time.

The strap is changed by gently removing the two horizontal pins that secure the strap attachment to the case lugs. Use a dedicated tool (spring bar tool) to lift the pin from its seat, avoiding bending the gold attachments. This procedure requires care to prevent scratching the precious case.

Yes, any strap with a 22mm lug width is mechanically compatible. However, we recommend verifying the thickness of the attachment (drop) to ensure the strap is neither too tight nor excessively loose within the case lugs. A small amount of play is normal and desirable to facilitate strap changes.

A leather strap from vegetable tanning subjected to daily wear lasts on average 3-5 years before showing failures in the stitching or at the attachment. Durability depends on climate (humidity accelerates aging), frequency of use, and periodic maintenance. Alligator or shell cordovan straps tend to last longer thanks to the superior structural density of the leather.