Breitling
Chronomat 40 GMT A323989A1C2A1— lug 20mm
Breitling Chronomat 40 GMT A323989A1C2A1: 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 A323989A1C2A1The essential strap measurement.
Browse 20mm straps →A323989A1C2A1
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 A323989A1C2A1?
The lug width of the Breitling Chronomat 40 GMT A323989A1C2A1 is 20 mm. This measurement must be taken internally between the lugs using a digital calliper placed against the case body, not at the outer tips of the horns. Any replacement strap must match this dimension precisely to ensure a secure and flush fit.
What is the best strap for the Breitling Chronomat 40 GMT A323989A1C2A1?
The ideal choice depends on the intended context. For formal or business wear, a 20 mm Mississippiensis alligator strap paired with a brushed steel deployante clasp is the most coherent option for this instrument-grade watch. For everyday casual use, a vegetable-tanned calf leather strap in cognac or black develops a distinguished patina over time. For sport or maritime environments, vulcanised rubber provides waterproofing and grip. A heavy nylon NATO strap remains the most authentic expression of the original tool watch ethos.
How do you change the strap on a Breitling Chronomat 40 GMT?
To replace the strap on the Chronomat 40 GMT, use a spring bar tool or a fine-tipped lever to compress the spring bar fitted between the case lugs. Press the spring bar inward to release it from the lug hole, remove the old strap, and fit the new one by re-engaging the spring bars on both sides until they click securely into place. The procedure requires no specialist tools but should be carried out carefully to avoid scratching the steel lugs.
Are there aftermarket straps compatible with the Breitling Chronomat 40 GMT A323989A1C2A1?
Yes. Any aftermarket strap measuring 20 mm at the lug end and fitted with standard spring bars is compatible with the Breitling Chronomat 40 GMT A323989A1C2A1, provided the spring bar length matches the internal lug width and the strap head thickness is suited to the lug opening. Milanostraps.it offers a curated selection of handcrafted 20 mm straps in leather, rubber and nylon compatible with this reference.
How long does a leather strap last on a Breitling Chronomat 40 GMT?
The lifespan of a leather strap depends on the material, tanning method and frequency of use. A quality vegetable-tanned calf leather strap, maintained with a leather conditioner every two to three months, typically lasts between two and four years under regular wear. A high-grade alligator strap can exceed five to seven years whilst retaining its structure and finish. Prolonged exposure to water, perspiration and direct sunlight accelerates deterioration; for sport or humid climates, alternating with a rubber or nylon strap is strongly advisable.