IWC
Da Vinci IW3736-06— lug 15mm

The lug width of the IW3736-06 is 15mm. This measurement is taken from the outer edge of one lug to the outer edge of the other lug on the case. The 15mm is specific to this ladies' model and not compatible with standard 18mm or 20mm straps, requiring purpose-built solutions for this dimension.

Alligator in cognac or havana tones is the reference choice, thanks to its regular natural grain that integrates visually with the steel case and milky dial. An extraordinary durable alternative is shell cordovan, which develops a deep patina with use. For everyday versatility, vegetable-tanned calf or a natural rubber strap maintained the formal elegance of the diminutive case without visual excess.

The strap is replaced using a watch spring bar tool (or a dedicated tool with interchangeable tips) to extract the lateral pins that hold the strap to the case lugs. Remove the original strap by gently pushing the pins downward, align the new 15mm strap by inserting it into the lug holes, then reinsert the pins until they click into place. The operation requires manual precision and a stable surface; if unsure, entrust the task to a qualified watchmaker.

Yes, 15mm compatible straps are available from specialized suppliers such as milanostraps.it, where you will find options in alligator, cordovan, calf, and rubber. All straps must have a 15mm lug width to fit the IW3736-06 lugs without play or restriction. Custom sizing is available at the Casati Milano atelier.

A quality handcrafted leather strap, with vegetable tanning and hand-sewn stitching, typically lasts 2-4 years with daily wear, depending on the frequency of use and environmental conditions (humidity, direct sunlight). Shell cordovan, for its intrinsic density, easily exceeds 5-7 years. Alligator and calf straps with vegetable tanning develop a fascinating patina during natural wear, making each strap a testament to daily use. The 18-month warranty on Casati Milano custom straps covers manufacturing defects and guarantees reliability.