Strap for Constellation Co-Axial 35 Stainless Steel / Yellow Gold / Champagne

The lug width of the Constellation 123.20.35.20.58.001 is 18 mm. This measurement represents the distance between the two attachment points (pins) on the case, where the strap attaches. It is the original specification for this model and is not negotiable to maintain the aesthetic and structural proportions of the case.

Alligator represents the optimal choice: the natural grain does not compete visually with the dial, and the texture is subtle and refined. Shell cordovan is excellent for those desiring noble aging and character development. Vegetable-tanned calf offers a balance between softness and formal versatility. We recommend thickness not exceeding 4 mm to maintain the harmonious proportions of the 35 mm case.

Strap changing requires a specialized tool to push the pins horizontally from the lugs. Position the watch with the dial facing down, locate the first pin to be removed (usually on the non-crown side), insert the tool into the small hole, and push gently. Repeat for the second pin. When installing the new 18 mm strap, ensure the pins are properly centered in the attachment points and click audibly into place.

No. A 20 mm strap is not compatible with the 18 mm lugs of this model without invasive modifications to the case, which would compromise the collectible value and original structure. Milano Straps offers custom-made 18 mm straps in premium leathers to avoid any risk of forced adaptation.

A quality alligator or shell cordovan strap from Casati Milano lasts 4-6 years with daily use and regular maintenance (monthly cleaning, storage in a dry environment). Cordovan ages nobly and can last beyond 8 years, developing a sought-after patina. Vegetable-tanned calf has slightly shorter cycles (3-5 years) but offers superior initial softness. Each piece includes an 18-month warranty.