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Breitling · Chronomat B01 42

Strap for Chronomat B01 42 NFL Indianapolis Colts

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

Lug width

22mm
22 mm strapsAll Breitling
Lug width22 mm
Case diameter42 mm
ReferenceAB01342B1C2S1
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

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Straps for the Chronomat B01 42 AB01342B1C2S1

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Chronomat B01 42 AB01342B1C2S1, seen from the bench

The Breitling Chronomat B01 42 AB01342B1C2S1 is a chronograph with origins in 1984 as the official timepiece of the Frecce Tricolori aerobatic team. The 42mm stainless steel case features a polished and brushed finish. The in-house B01 calibre, a respected Swiss chronograph movement, offers 70 hours of power reserve and COSC chronometer certification. The dial displays three symmetrical chronograph counters, a date window at 3 o'clock, and a tachymetic scale on the bezel. The lug width is 22mm.

Frequently asked questions

What is the lug width of the Breitling Chronomat B01 42 AB01342B1C2S1?

The lug width of the Breitling Chronomat B01 42 AB01342B1C2S1 is 22mm. This measurement is consistent across both lugs with no taper at the attachment point, meaning any straight-ended 22mm strap is directly compatible with this reference.

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

For the Chronomat B01 42, the most fitting materials are Hornback alligator for formal occasions, vegetable-tanned calf leather for daily wear that develops a personal patina over time, and nylon NATO for sporting use. A stainless steel deployant clasp is the most technically coherent choice given the weight and character of the 42mm case.

How do I change the strap on the Breitling Chronomat B01 42?

The strap is replaced using a fine-tipped spring bar tool to release the spring bars from the 22mm lugs. Work on a soft surface to protect the stainless steel case. No specialist watchmaking tools are required — the operation can be carried out independently in a matter of minutes.

Are there aftermarket straps compatible with the Breitling Chronomat B01 42 AB01342B1C2S1?

Yes. Any strap with a 22mm attachment width and straight ends is compatible with the Breitling Chronomat B01 42 AB01342B1C2S1. Milano Straps offers a curated selection of handcrafted straps in various materials and finishes, all produced specifically for high-end timepieces.

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

The lifespan of a leather strap depends on the material and conditions of use. A quality vegetable-tanned calf strap, with regular care, typically lasts 2–4 years of daily wear. Alligator leather, owing to its denser fibre structure, tends to last longer. Prolonged exposure to water, perspiration and UV light accelerates wear; rotating between multiple straps and avoiding sustained moisture contact is strongly recommended.

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