Strap for Constellation Co-Axial 27 Brushed Stainless Steel / Diamond / Pink MOP

The lug width of model 123.15.27.20.57.002 is exactly 16mm. This width is specific to the 27mm case of the Constellation and guarantees optimal proportions between the wrist and the dial. Measuring lug width means positioning the caliper between the outer shoulders of the pins that connect the case and strap, without excessive tolerances.

For the 123.15.27.20.57.002, alligator dyed in dark shades (black, deep brown, burgundy) represents the most sophisticated solution. Alternatively, full-grain regenerated calf offers greater versatility and a broader range of colour possibilities. Shell cordovan, with its deep and mirror-like patina, further elevates the aesthetic profile for collectors who understand the value of leather transformation over time.

To change the strap on a watch with 16mm lug width, you need a spring bar tool designed for this purpose. Insert the pointed end of the tool under the pin, applying light pressure to compress the internal spring, then slide the pin outward. Repeat for the other side. When mounting the new strap, reverse the procedure ensuring the pin clicks firmly into position.

Any strap with 16mm lug width is compatible with the 123.15.27.20.57.002. Custom 16mm straps are available online on milanostraps.it with personalizable sizes, initials and stitching thread, ready for shipment. For specific requirements, the Casati Milano atelier produces bespoke straps with personal selection of leathers and an 18-month guarantee.

The durability of a leather strap depends on the material and usage. A quality alligator or calf, with appropriate vegetable tanning, easily reaches 5-10 years of regular wear, especially if subjected to periodic maintenance (rapid drying after moisture, occasional conditioning with specific creams). Shell cordovan, thanks to its density and superior fibrous structure, extends durability further. A standard 18-month guarantee, such as that offered by Casati Milano, testifies to confidence in the product's construction quality.