Strap for Breitling Chronomat Automatic GMT 40 NFL Miami Dolphins Edition

The lug width of the Breitling Chronomat 40 GMT A32398B11L1A1 is 20mm. This measurement is consistent across the entire Chronomat 40 GMT range and determines compatibility with any aftermarket or bespoke 20mm strap.

For the Chronomat 40 GMT, a vegetable-tanned alligator or shell cordovan strap represents the most fitting choice for the watch's professional character. For intensive daily wear, a matte calf leather strap with a 20/18mm taper or a shaped rubber strap offers durability and comfort without compromising aesthetics.

The strap on the Chronomat 40 GMT is secured by standard 20mm springbars. A springbar tool — either a fork-style or pin tool — is all that is required to lever against the lug and release the bars. No watchmaker intervention is necessary, though care should be taken to avoid scratching the case during the process.

Yes. Any aftermarket strap with a 20mm lug width is compatible with the Breitling Chronomat 40 GMT A32398B11L1A1. Milano Straps offers a curated selection of handcrafted leather, NATO and rubber straps in the 20mm size, with bespoke options available through Atelier Casati Milano.

The lifespan of a leather strap depends on the type of leather and frequency of wear. A quality alligator or shell cordovan strap, properly maintained — cleaned regularly and kept away from prolonged water exposure — can last between 3 and 7 years. Vegetable-tanned straps develop a patina over time, improving aesthetically with use. Casati Milano offers an 18-month warranty against manufacturing defects.