Breitling · Chronomat B01 42

Strap for Chronomat B01 42 NFL Miami Dolphins

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width22 mm
Case diameter42 mm
ReferenceAB01342B1L2S1
FamilyChronomat B01 42
MovementBreitling caliber B01 hours, minutes, small seconds | date | Chronograph, column wheel | chronometer
Year2024
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

Straps for the Chronomat B01 42 AB01342B1L2S1

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Chronomat B01 42 AB01342B1L2S1, seen from the bench

The Chronomat B01 42 is powered by the Breitling B01 automatic caliber with a column-wheel chronograph function and chronometer certification. The movement indicates hours, minutes, small seconds and date. The watch features 22mm lugs.

Frequently asked questions

What is the lug width of the Breitling Chronomat B01 42 AB01342B1L2S1?

The lug width of the Breitling Chronomat B01 42 AB01342B1L2S1 is 22 mm. This is the standard measurement for this Breitling chronograph family and requires straps with straight ends to ensure a correct fit against the squared lugs of the case.

What is the best strap for the Breitling Chronomat B01 42?

The ideal choice depends on intended use and aesthetic preference. A cross-grain alligator strap enhances the structured dial in a sport-elegant register. Vegetable-tanned calf leather develops a natural patina suited to daily wear. Vulcanised rubber is recommended for aquatic activities, while a nylon NATO strap references the Chronomat's aeronautical heritage. All options must feature a 22 mm lug width with straight ends.

How do you change the strap on a Breitling Chronomat B01 42?

The strap is removed using a spring bar tool inserted into the lateral hole on the case lugs. Care should be taken to avoid scratching the stainless steel surfaces — placing the watch on a soft cushion before operating is strongly advised. The original spring bars can be reused with the new strap provided they remain in good condition.

Are there aftermarket straps compatible with the Chronomat B01 42 AB01342B1L2S1?

Yes. Any strap with a 22 mm lug width and straight ends is technically compatible with the Breitling Chronomat B01 42 AB01342B1L2S1. Milano Straps offers a range of handcrafted straps in various materials — leather, alligator, rubber, NATO — fitted with standard 22 mm spring bars and requiring no modification to the case.

How long does a leather strap last on a Breitling Chronomat B01 42?

Longevity depends on leather quality, care, and frequency of use. A high-quality vegetable-tanned calf leather strap, kept away from prolonged water exposure and conditioned periodically with a neutral balm, can last between 2 and 4 years with daily wear. A high-grade bombé alligator strap, owing to its denser fibre structure, may exceed 5 years with proper maintenance. Milano Straps provides an 18-month guarantee against manufacturing defects on all straps.

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