Strap for Constellation Master Chronometer 39 Sedna - Diamond / Silver / Bracelet

The lug width of the Constellation 131.55.39.20.52.001 is 24mm. This dimension represents the space between the case lugs and determines strap compatibility. To verify, measure with a ruler the distance between the lower lugs: you will obtain exactly 24mm, the specific standard for this model.

For the Constellation in Sedna Gold we recommend noble leathers that dialogue with the warm tone of rose gold: alligator in cognac shades for classical elegance, chocolate brown shell cordovan for spectacular patina over time, Italian vegetable-tanned calf for natural softness. All will require a 24mm deployant preferably in rose gold matching the case.

Strap changes are performed via spring bars that are extracted from the case lugs. Use a dedicated tool (spring bar tool) to gently push the bar from one side until it releases, then remove the old strap. Insert the new strap aligning its ends with the lug holes and reinsert the bar until it clicks into position. Avoid forcing to preserve the case finish.

Yes, any strap with 24mm lug width is compatible with the Constellation. What matters is verifying that the strap has standard spring bars and that the deployant (safety clasp) is sized for 24mm. We advise against uncertified straps or finishes that could scratch the Sedna Gold: privilege attested artisanal quality.

A noble leather strap (alligator, cordovan, calf) on a daily-worn watch typically lasts 3-5 years, with variability related to use, climate and care. Vegetable-tanned leathers age progressively developing patina. We recommend rotating between two or three straps and periodic maintenance (conditioning with neutral wax) to extend longevity and accelerate controlled aesthetic aging.