Strap for Chronomat Colt 41 Automatic Silver / Bracelet

The lug width of the Breitling Colt A1731310.G837.190A is 20 mm. This measurement is taken using a digital calliper placed inside the lug bridge, parallel to the spring bar axis. 20 mm is one of the most common lug widths in Swiss professional watchmaking, ensuring a wide selection of compatible straps.

The Colt pairs well with a vegetable-tanned alligator strap in a matte finish for formal wear, a vulcanised rubber strap for sport or water use, and a ballistic nylon NATO for everyday versatility. Military-grained calfskin is a well-regarded intermediate choice. A polished steel deployant clasp is recommended for quality leather straps.

Strap replacement on the Colt is carried out using standard 20 mm spring bars. Using a spring bar tool or a lug lever, compress the spring bar on the inner side of the lug, remove the old strap and fit the new one. No case disassembly or specialised tools are required. It is advisable to work on a soft surface to avoid scratching the case.

Yes, any strap with a 20 mm attachment is compatible with the Breitling Colt A1731310.G837.190A. The artisan aftermarket offers options in alligator, calfskin, shell cordovan, rubber and nylon. Milanostraps.it offers a curated selection of handcrafted 20 mm straps, with full customisation available through the Casati Milano atelier.

The lifespan of a leather strap depends on the quality of the hide, daily care and intensity of use. A high-quality vegetable-tanned alligator strap, used in rotation and kept away from prolonged water and perspiration exposure, can last between 3 and 7 years whilst retaining an excellent appearance. Shell cordovan, due to its compact fibre structure, tends to develop a patina rather than deteriorate, offering above-average longevity.