Strap for Breitling Chronomat Automatic GMT 40 NFL New Orleans Saints Edition

The lug width of the Breitling Chronomat 40 GMT (ref. A32398D11B1A1) is 20mm. This measurement refers to the internal distance between the case lugs — the point at which the strap attaches. This is the specification required when selecting any aftermarket strap compatible with this reference.

The ideal choice depends on intended use. For formal occasions, an alligator strap with a vegetable-tanned, mat grain finish complements the stainless steel case without overpowering the wrist. For sport or travel, vulcanised rubber or ballistic nylon NATO straps offer durability and comfort. Box-calf leather provides the most versatile solution, equally suited to daily wear and business settings.

Replacing the strap requires a 20mm spring bar and a bifurcated springbar tool. Insert the tool between the lug and the strap end, compress the spring bar on both sides, and slide the strap free. The operation takes approximately two minutes and does not require any movement servicing. It is advisable to work on a soft surface to prevent scratching the case.

Yes. Any strap with a 20mm attachment is technically compatible with ref. A32398D11B1A1, provided the spring bars are standard and the bar length matches the lug width. Milano Straps offers a curated selection of handcrafted 20mm straps, with options to customise length, thickness, colour, and buckle type.

The lifespan of a leather strap depends on the quality of the tanning, leather thickness, and frequency of use. A high-grade vegetable-tanned alligator strap, worn regularly but not in sporting conditions, typically lasts between three and five years before significant wear appears at the lug attachment points. Box-calf leather, being more porous, benefits from periodic conditioning with a neutral cream. Prolonged exposure to perspiration and water will noticeably shorten the life of any leather strap.