Breitling · Chronomat B01 42

Strap for Chronomat B01 42 NFL New England Patriots

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
ReferenceAB01342B1C7S1
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 AB01342B1C7S1

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Chronomat B01 42 AB01342B1C7S1, seen from the bench

The Breitling Chronomat B01 42 (ref. AB01342B1C7S1) is a sports chronograph born in 1984 to serve the Patrouille de France aerobatic team. The 42 mm stainless steel case houses the in-house Caliber B01 movement, beating at 28,800 vph with a 70-hour power reserve and COSC certification. The lug width is 22 mm, engineered to balance the case mass and optical weight of the rider tabs. Water-resistant to 200 meters.

Frequently asked questions

What is the lug width of the Breitling Chronomat B01 42 AB01342B1C7S1?

The Breitling Chronomat B01 42 AB01342B1C7S1 has a lug width of 22 mm. This is a standardised measurement on this reference, allowing direct replacement with any 22 mm aftermarket strap without the need for adapters.

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

The most suitable materials for the Chronomat B01 42 are alligator leather for formal-sport contexts, vegetable-tanned Tuscan calf leather for everyday versatility, and vulcanised rubber for marine or athletic environments. Alligator grain complements the mixed case finishes particularly well, while calf leather develops a distinctive patina with wear.

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

Strap replacement requires a double-ended spring bar tool. Insert the fine tip into the lug hole or between the lug and strap, compress the spring bar, and slide the strap free. Work on a soft surface to avoid case scratches. If in doubt, consult a qualified watchmaker.

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

Yes. Any standard 22 mm strap with a conventional spring bar is compatible with the Breitling Chronomat B01 42. Milano Straps offers a curated range of handcrafted 22 mm straps in alligator, calf, shell cordovan, and technical materials, finished to a standard befitting this calibre of timepiece.

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

Strap longevity depends on leather quality, exposure to perspiration and moisture, and maintenance routine. A high-quality vegetable-tanned calf strap, properly conditioned and kept away from prolonged water exposure, typically lasts between two and five years. Alligator and shell cordovan, owing to their denser fibre structure, generally offer superior durability. Milano Straps provides an 18-month guarantee against manufacturing defects.

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