Blancpain
L-Evolution 560STC-11B30-52B— lug 23mm

The lug width of the Blancpain L-Evolution 560STC-11B30-52B is 23mm. This is a non-standard dimension, larger than the typical 20-22mm, determined by the proportions of the 43.50mm case. To verify it, place a calliper between the internal lugs of the case.

Alligator with vegetable tanning is the traditional choice for this chronograph: it develops a warm patina over time and maintains robust structure. Burgundy shell cordovan offers exclusivity and contrast with the satin-brushed steel. For extensive daily wear, vegetable-tanned calf leather is practical without aesthetic compromise. In aquatic environments, silicone rubber with crosswise ridges is the most functional solution.

Use a spring bar removal tool to release the spiral spring that holds the strap inside the lug. Insert the tool into the lower slot of the pin, apply outward pressure and simultaneously pull the strap away. Repeat for both lugs. Installing the new strap is the reverse process: align the strap holes with the lug pins and press the pin until it seats securely.

Yes. Any strap with a 23mm lug width is compatible with the 560STC-11B30-52B. However, ensure that the nominal width of the strap is 5-6mm to avoid visual disproportion. The artisanal straps in the 23mm collection from Milano Straps have been tested and approved for this reference.

An alligator or shell cordovan strap with vegetable tanning typically lasts 4-6 years with daily wear and regular maintenance (hydration with natural oils every 6-8 months). Vegetable-tanned calf leather has similar longevity, with faster and more visible ageing. Durability depends on exposure to moisture, sweat and temperature. Casati Milano provides an 18-month warranty against manufacturing defects.