Strap for Breitling Chronomat Automatic GMT 40 NFL Detroit Lions Edition

The lug width of the Breitling Chronomat 40 GMT A32398B31C1A1 is 20mm. This measurement is taken internally between the two lugs at the point where the strap meets the case, and it is compatible with any standard 20mm watch strap.

For the Chronomat 40 GMT, a matte alligator strap with an 18mm brushed steel deployant clasp is the most coherent choice, matching the case's satin finish. A vegetable-tanned calfskin strap develops a distinctive patina over time, while vulcanised rubber is ideal for water-resistant or sporting use.

Use a fine-tipped spring bar tool inserted into the slot of the spring bar at the lug. Work on a soft surface to avoid scratching the case. Slide the spring bar out laterally, fit it through the new strap's keeper, and reinsert it into both lugs until it clicks securely into place.

Yes. Any aftermarket strap with a 20mm lug width is compatible with the Chronomat 40 GMT A32398B31C1A1. MilanoStraps offers a curated range of handcrafted 20mm straps in various leathers and finishes, designed to fit the specific geometry of Breitling lugs.

The lifespan of a leather strap depends on material quality and care. A quality alligator or calfskin strap, regularly treated with leather conditioner and kept away from prolonged exposure to water and perspiration, can last between three and six years with daily wear. Vegetable-tanned leathers improve in character over time as they develop a personal patina.