Strap for Breitling Chronomat Automatic GMT 40 NFL Dallas Cowboys Edition

The lug width of the Breitling Chronomat 40 GMT A32398B41C1A1 is 20mm. This measurement is taken between the spring bars inside the case lugs and is the critical parameter for selecting a compatible strap.

For the Chronomat 40 GMT, a vegetable-tanned alligator strap is the most refined choice for formal and travel contexts. Box calf leather suits sober daily wear, whilst vulcanised rubber is recommended for sporting use or high-humidity environments. A woven nylon NATO remains true to the model's original aeronautical character.

To replace the strap, remove the spring bars from the lugs using a fine-tipped springbar tool. The original Breitling spring bars are standard diameter and can be reused with quality aftermarket straps. It is advisable to work on a soft surface to avoid scratching the case or bezel.

Yes. Any strap with a straight or gently curved 20mm end is compatible with the Chronomat 40 GMT A32398B41C1A1. Milanostraps.it offers a curated selection of handcrafted 20mm straps in leather, rubber, and nylon made specifically for this case profile.

Longevity depends on the material and care routine. A high-quality vegetable-tanned alligator strap, conditioned every 3–4 months and kept away from excessive moisture, can last over five years while retaining structural integrity and patina. Calf leather typically lasts 2–3 years with daily wear. Frequent exposure to water or perspiration significantly reduces the lifespan of any leather strap.