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Breitling · Chronomat 40 GMT

Strap for Breitling Chronomat Automatic GMT 40 NFL New York Jets Edition

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

20mm
20 mm strapsAll Breitling
Lug width20 mm
Case diameter40 mm
ReferenceA32398C61L1A1
FamilyChronomat 40 GMT
MovementBreitling caliber Caliber 32 Hours, Minutes, Seconds, Additional 24 Hour Hand (adjustable) | Date
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

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The Chronomat 40 GMT A32398C61L1A1, seen from the bench

The Breitling Chronomat GMT features the automatic Caliber 32 with GMT function via an adjustable 24-hour hand and date indication. The model has 20mm lugs and integrates hour, minute, second and second time zone functions. The A32398C61L1A1 reference is part of the Chronomat collection in the 40mm diameter version.

Frequently asked questions

What is the lug width of the Breitling Chronomat 40 GMT A32398C61L1A1?

The Breitling Chronomat 40 GMT A32398C61L1A1 has a lug width of 20mm. This measurement can be verified using a digital calliper to measure the internal distance between the two lugs at their narrowest point, where the strap is fitted.

What is the best strap for the Breitling Chronomat 40 GMT?

The most suitable options for the Chronomat 40 GMT are: vegetable-tanned alligator for a bespoke finish, box-calf leather for understated elegance, vulcanised rubber for sporting use, and ballistic nylon NATO for authenticity to the watch's aviation heritage. A steel deployant clasp is recommended across all materials for comfort and strap longevity.

How do I change the strap on the Breitling Chronomat 40 GMT A32398C61L1A1?

To replace the strap, use a spring bar tool to compress the spring bar on one side of the lug, slide the strap free, then fit the new strap ensuring the spring bar clicks firmly into both lug holes. Always work on a soft surface to avoid scratching the case.

Are there aftermarket straps compatible with the Breitling Chronomat 40 GMT?

Yes. Any strap with a standard 20mm attachment and appropriately sized spring bars is compatible with the Breitling Chronomat 40 GMT. Milano Straps offers a curated selection of handcrafted 20mm straps in various materials and finishes, all compatible with this reference.

How long does a leather strap last on a Breitling Chronomat 40 GMT?

Longevity depends on the material and conditions of use. A quality vegetable-tanned alligator strap, properly maintained with periodic conditioning cream and kept away from direct heat, can last between three and seven years. Box-calf offers similar durability. Frequent exposure to water or perspiration accelerates wear; in such conditions, alternating with a rubber or NATO strap is advisable.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only