Strap for Big Crown Chronograph Stainless Steel - Rose Gold / Silver / Bracelet

The lug width of this model is 21 millimetres. This measurement refers to the internal distance between the two spring bar pins on the watch case. To verify, position a digital calliper perpendicularly between the pins: the value must be exactly 21mm to ensure compatibility with aftermarket straps.

A vegetable-tanned calf leather strap in dark brown or a black alligator strap represent the ideal choices. With vegetable-tanned calf, the natural patina that develops over time emphasises the tool-watch character of the watch. For technical materials, a cotton-nylon NATO or FKM rubber offer versatility in sporting contexts without functional compromise.

Position the watch on a stable surface with the caseback facing downward. Locate the spring bar pins passing through the lateral holes in the case. Use a specialist spring bar tool and press gently to release the strap. Align the new strap's lug holes with the case apertures and push the pin into position until it clicks. Verify that the installation is secure.

Yes, provided the strap is dimensioned for a 21mm lug width. Artisanal straps of quality, such as those produced by Casati Milano, are constructed specifically for this measurement and guarantee secure fitting without play. Always confirm compatibility with your specific model before purchase.

Durability depends on leather quality, intensity of use and climatic conditions. A vegetable-tanned calf strap of good quality typically lasts 4-6 years with moderate daily wear. Premium materials such as alligator or shell cordovan age more slowly and may last 7-10 years. Frequent exposure to humidity and perspiration reduces longevity.