Strap for Master Chronometer 36 Stainless Steel / Sedna Gold / Diamond / Brown / Strap

The lug width of the Constellation 131.28.36.20.63.001 is 20mm. This dimension is specifically calculated for the proportions of the 36mm case and represents the distance between the axes of the spring bars (the small protrusions that secure the strap). To verify it correctly, measure the horizontal space between the two holes where the strap sits, not the width of the case.

Alligator is the classic choice for this model: its naturally uniform texture creates sophisticated sobriety in harmony with the golden griffes. Vegetable-tanned calf is excellent for those seeking a patina that evolves over time. Shell cordovan offers a fascinating contrast with the tone of Sedna gold. For everyday versatility, premium FKM rubber remains a legitimate option.

To change the strap, use a spring bar tool (the small specialized tool with a notch) to gently lift the spring bars from their seats in the case. Insert the tip of the tool into the lower slot of the spring bar, apply slight lateral pressure and the spring bar will pop out. Repeat on the other side. Seat the spring bars in the new strap by snapping them into place. This operation is straightforward and requires no expertise: the important thing is to avoid dropping the spring bar during removal.

Yes, any strap with a 20mm lug width is compatible with the Constellation 131.28.36.20.63.001. The important thing is to verify that the spring bars are correctly seated and that the strap is the right length for your wrist. Artisanal straps from Milano Straps are made specifically for this dimension and guarantee maximum precision.

Durability depends on use and maintenance. A quality alligator or calf, with buckle replacement every 3-4 years and gentle monthly cleaning, can last 5-7 years. FKM rubber straps resist for 8-10 years. Shell cordovan, thanks to its density, can exceed 10 years. Vegetable tanning requires more attention to humidity, but if well cared for it ages magnificently. Casati Milano provides an 18-month warranty on every customized strap.