Breitling
Chronomat 40 GMT A32398B91B1A1— lug 20mm
Breitling Chronomat 40 GMT A32398B91B1A1: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.
Artisanal Note
"This model requires a precise 20mm lug width to preserve the original sartorial balance."
Technical Specifications
Breitling A32398B91B1A1The essential strap measurement.
Browse 20mm straps →A32398B91B1A1
Breitling caliber Caliber 32 Hours, Minutes, Seconds, Additional 24 Hour Hand (adjustable) | Date
The Heritage
Compatible Straps
Selected for the 20mm lug width of the Chronomat 40 GMT
FAQ
What is the lug width of the Breitling Chronomat 40 GMT A32398B91B1A1?
The Breitling Chronomat 40 GMT A32398B91B1A1 features a 20mm lug width, measured between the inner case lugs. The standard taper closes at 18mm. Any 20mm strap with an 18mm buckle end is compatible with this reference.
What is the best strap for the Breitling Chronomat 40 GMT?
The choice depends on intended use. For professional or formal settings, a vegetable-tanned alligator strap complements the case finishing and develops a distinguished patina over time. For sporting or marine use, vulcanised rubber or ballistic nylon NATO straps offer durability without compromising aesthetics. Shell cordovan is the premium choice for formal occasions.
How do you change the strap on a Breitling Chronomat 40 GMT?
Strap replacement requires a springbar tool — a forked-tip instrument that compresses the spring bars housed within the case lugs. Insert the tip into the lug slot, compress the spring bar, and slide the strap free. Exercise care to avoid scratching the case surfaces. The operation takes only a few minutes and can be performed independently.
Are aftermarket straps available for the Breitling Chronomat 40 GMT?
Yes. Any strap with a 20mm lug end and 18mm buckle end is technically compatible. Casati Milano crafts bespoke aftermarket straps proportioned specifically for the Chronomat 40, with taper and length optimised for the model's wider lug geometry. Materials are selected to match the construction quality of the watch itself.
How long does a leather strap last on a Breitling Chronomat 40 GMT?
Longevity depends on material, usage, and maintenance. A high-quality vegetable-tanned alligator strap, with moderate daily wear and periodic conditioning, will last three to five years while retaining structural and aesthetic integrity. Shell cordovan is the most durable option due to its dense fibre structure. Exposure to moisture or marine environments significantly reduces leather lifespan; rubber or NATO straps are recommended in such conditions.