Strap for Constellation Manhattan 29 Co-Axial Master Chronometer Stainless Steel / Sedna Gold / Silver

The reference 131.20.29.20.02.001 is fitted with an 18mm lug width. This measurement is specific to the 29mm model and is calculated as the external distance between the two case lugs at the strap attachment point. To verify it, use a digital caliper by measuring between the two metal pins.

Alligator is the optimal choice for this model, as the regular grain enhances the Sedna Gold and the patina that develops over time creates a perfect dialogue with the hybrid case (rose gold and steel). A cognac alligator amplifies the warmth of the gold, while a polished black balances the steel. Shell cordovan is the premium alternative for those who appreciate natural patination.

The Constellation features push-fit pins. Remove the old strap by inserting a flat tool (spring bar tool) under the pin, lifting slightly to release the internal spring. Extract the pin and repeat on the other side. For the new strap, align the lugs with the case holes and insert the pins until they click into place. If you prefer, the Casati Milano atelier performs the change with personalized consultation.

No. Although the lug width is 18mm, the Constellation requires a strap specifically designed for this compact case. Generic straps may not respect the visual proportions or may present excessive side gaps. Milano Straps offers 18mm straps verified for the Constellation, with finishes that enhance the Sedna Gold and steel.

A quality alligator or cordovan, with regular care (gentle cleaning and conditioning every 6 months), lasts 4–6 years. Daily wear accelerates deterioration compared to part-time use. Vegetable-tanned leather strap ages faster but develops a fascinating patina. Casati Milano offers an 18-month warranty on all handcrafted straps and supports renewal with loyalty discounts.