Strap for Breitling Chronomat Automatic GMT 40 NFL Los Angeles Chargers Edition

The lug width of the Breitling Chronomat 40 GMT A32398C41C1A1 is 20 mm. This measurement should be taken with a digital calliper positioned perpendicularly between the two lugs, in direct contact with the case, to obtain a reading accurate to the nearest tenth of a millimetre.

For the Breitling Chronomat 40 GMT, the most suitable materials are vegetable-tanned alligator leather for formal and smart-casual contexts, deer leather for intensive daily use, and vulcanised rubber for sporting applications. The choice depends on the dial variant and intended use: a strap with curved ends is preferable to respect the curved lug geometry of this reference.

The strap is removed using a fine-tipped spring bar tool inserted into the hole or the lateral slot of the lug to compress the spring bar. It is advisable to work on a soft surface to avoid scratching the case. The Chronomat 40 GMT features internally curved lugs: ensure the replacement strap has compatible curved ends before proceeding with installation.

Yes. Aftermarket straps in 20 mm width with curved ends compatible with the Chronomat 40 GMT lug geometry are available at milanostraps.it in the section dedicated to 20 mm lug widths. It is essential to verify that the strap end respects the curvature of the lugs to ensure proper fit and a visual result consistent with the original design.

The lifespan of a leather strap depends on the material, care and frequency of use. A well-maintained vegetable-tanned alligator strap — treated periodically with nourishing cream and kept away from prolonged exposure to water and perspiration — can last between three and six years while retaining its texture and structure. Deer leather and shell cordovan offer superior mechanical resistance to flexion, further extending the useful life of the strap.