Cartier
Tank WSTA0041— lug 18mm

The Cartier Tank WSTA0041 has a lug width of 18mm. This measurement is the internal space between the two metal lugs of the case where the strap is inserted. It is essential to measure correctly with a caliper to avoid visual misalignment and damage to the case.

For the WSTA0041, dark brown alligator is the most refined and conservative choice, perfect for the Tank's formality. Alternatively, deep burgundy or black calfskin offers elegance with greater daily practicality. A navy blue NATO strap with stripes transforms the Tank into a more sporty and contemporary look. The choice depends on your lifestyle and primary context of use.

The change is simple: use a dedicated tool (spring bar tool) to gently push the spring bar that secures the strap to the case. Remove the old strap, then insert the spring bar into the new strap and align the lug ends with the case. The spring bar will click into place, securing the strap firmly. If you are unsure, the Casati Milano atelier will assist you by appointment.

Yes, as long as they have an 18mm lug width and high construction quality. Artisanal straps made with premium leathers (alligator, calfskin) and double-stitching are fully compatible and often offer better value for money than branded straps. Always verify that the lug width is 18mm and that tolerances are precise to avoid play and case wear.

An artisanal quality leather strap, used daily, has an average lifespan of 3-5 years. The patina and color will evolve beautifully over time. Wear depends on exposure to humidity, sweat, and UV rays. An alligator strap tends to last longer than a calfskin one due to greater fiber density. The Casati Milano warranty covers the strap for 18 months against manufacturing defects.