Strap for Constellation Co-Axial 31 Stainless Steel / Red Gold / Diamond / Brown Supernova

The lug width of the Constellation Manhattan 123.25.31.20.63.001 is 18mm. This dimension is specific to this compact 31mm diameter model. To verify it, measure the distance between the case lugs at the widest point with a digital caliper. On milanostraps.it all straps in the 18mm collection are tested for compatibility with this reference.

For the Constellation Manhattan in red gold and steel, we recommend black or dark brown alligator (maximum contrast with the dial), or cognac vegetable-tanned calf (chromatic harmony with the gold). If you prefer temporal development, shell cordovan will develop a deep patina. For summer versions, natural rubber or grey/black NATO offer modernity. All pairings must respect the postmodern elegance of the Didisheim design.

The lugs on this Constellation are well-defined and sharp-edged. Use a spring bar tool to depressurize the pin that secures the current strap to the lugs. Remove the old strap, verify that the pin is intact, and insert the new 18mm strap ensuring that the width is perfectly calibrated. Casati Milano offers strap-change service by appointment at the atelier with personalized aesthetic consultation.

Yes, provided it is sized exactly at 18mm width with lugs conforming to the case geometry. Many generic 18mm straps have uncalibrated thicknesses: on milanostraps.it the selection is curated to guarantee perfect fit and prevent warping at the lugs. Bespoke straps from Casati Milano are constructed to precise measurements provided by the client or taken directly at the atelier.

Durability depends on the leather type and usage. Alligator and shell cordovan with vegetable tanning require 3-5 years of regular daily use before significant wear, developing aesthetic patina. Box calf is more resistant (4-6 years), while soft calf wears out in 2-3 years if exposed to frequent perspiration. Casati Milano provides an 18-month warranty on all handcrafted straps and recommends periodic maintenance (cleaning, conditioning with neutral oils) to extend useful life.