Strap for Colt 41 Automatic Volcano Black / Calf

The lug width of the Breitling Colt A1731311.BE90.425X is 20mm. This measurement is taken internally between the two lugs at the base of the case and is the key parameter for selecting any compatible aftermarket strap.

The ideal choice depends on intended use: a vegetable-tanned alligator strap in midnight blue or cognac brown complements the instrument character of the watch; a grained calf leather strap offers maximum daily versatility; vulcanised rubber is preferable for outdoor activities. All straps must fit a 20mm lug width.

Strap replacement requires a double-ended spring bar tool. Insert the fine tip into the lug hole to compress the spring bar and release the strap. Care must be taken to avoid scratching the stainless steel case. If in doubt, a watchmaker or the Casati Milano atelier can perform the swap in minutes.

Yes. The standard 20mm lug width of the Colt A1731311.BE90.425X is compatible with a wide range of artisan aftermarket straps. Simply ensure the lug end width is 20mm and that the overall length — typically 120/75mm or 115/75mm — suits your wrist circumference. Milanostraps.it offers a dedicated selection for this size.

The lifespan of a leather strap depends on leather quality, tanning method, and daily wear. A quality vegetable-tanned calf strap, worn with care and stored properly, can last 2 to 3 years or more. Perspiration and moisture are the primary causes of deterioration: rotating between multiple straps and applying a leather conditioner periodically will significantly extend the strap's life.