Strap for Breitling Chronomat Automatic GMT 40 NFL Tennessee Titans Edition

The lug width of the Breitling Chronomat 40 GMT A32398E31C1A1 is 20 mm. This is the measurement required to select a compatible strap, and it can be verified using a digital calliper placed between the inner surfaces of the case lugs.

The ideal choice depends on context. For a dress-sport setting, an alligator strap in vegetable-tanned leather with a natural patina is the most refined option. For everyday versatility, smooth calf leather or shell cordovan offer both durability and elegance. A nylon NATO strap references the Chronomat's instrumental origins, while vulcanised rubber is the preferred choice for aquatic or high-activity use.

Strap replacement requires a double-ended spring bar tool: insert the tip between the lug and the strap end, compress the spring bar and slide the strap free. Care must be taken to avoid scratching the stainless steel case. Alternatively, any watchmaker or the Casati Milano atelier can perform the swap in a matter of minutes.

Yes. Any strap with a 20 mm lug width and standard 1.8 mm spring bars is technically compatible. milanostraps.it offers a curated selection of handcrafted straps in various materials — leather, rubber, NATO — made specifically for 20 mm lug watches, with finishing quality comparable to Breitling's own strap range.

Longevity depends on the material and usage. A calf leather strap, with regular conditioning and protection from moisture, typically lasts 2 to 3 years. Shell cordovan, owing to the density of its fibres, can exceed 5 years. Vegetable-tanned alligator, if properly maintained, develops a distinguished patina and lasts several years. Casati Milano straps carry an 18-month guarantee against manufacturing defects.