Strap for Colt 41 Automatic Volcano Black / Calf

The lug width of the Breitling Colt A1731311.BE90.428X is 20mm. This measurement should be taken internally between the two lugs using a digital calliper, at the base of the lug attachment, to ensure correct compatibility with any aftermarket strap.

The ideal strap depends on the intended use. For versatile daily wear, a vegetable-tanned calf leather strap in 20mm offers a balance of durability and refinement. For sport or aquatic use, vulcanised rubber is the most practical option. For formal pairings, smooth alligator in black or tobacco enhances the stainless steel case whilst respecting the instrument-oriented character of the watch.

The strap is replaced using a dedicated springbar tool, inserting the tip into the lug slots to compress the ends of the spring bars. It is advisable to work on a soft surface to avoid scratching the case, and to ensure the replacement spring bars are the correct length for the 20mm lug width of the Colt.

Yes. Any strap with a 20mm attachment is technically compatible with the Breitling Colt A1731311.BE90.428X. milanostraps.it offers a selection of handcrafted leather, NATO and rubber straps with a 20mm lug width, made from selected materials and also available in bespoke versions through the Casati Milano atelier.

Longevity depends on the quality of the tanning process and the intensity of use. A vegetable-tanned calf or alligator strap, maintained with regular conditioning cream and protected from excessive moisture, retains its structural and aesthetic integrity for 3 to 5 years of regular use. Shell cordovan, owing to the density of its fibres, tends to last longer whilst developing a distinctive patina over time.