Breitling · Chronomat B01 42

Strap for Chronomat B01 42 NFL Cincinnati Bengals

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
ReferenceAB01342B1O1S1
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 AB01342B1O1S1

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Chronomat B01 42 AB01342B1O1S1, seen from the bench

The Chronomat B01 42 is powered by the in-house automatic Caliber B01 with column-wheel chronograph function and chronometer certification. The watch features a 42mm case with 22mm lugs and offers hour, minute, small seconds and date indication. The B01 movement provides a power reserve of around 70 hours.

Frequently asked questions

What is the lug width of the Breitling Chronomat B01 42 AB01342B1O1S1?

The lug width of the Breitling Chronomat B01 42 AB01342B1O1S1 is 22 mm. This measurement is essential when selecting an aftermarket strap: any replacement strap must have a 22 mm attachment width, and ideally it should accommodate the pronounced lug curvature typical of this model.

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

For the Chronomat B01 42, the most fitting options include alligator leather with a pronounced grain and matte finish, vegetable-tanned calf leather that develops a natural patina over time, or vulcanised rubber for sporting use. A NATO nylon strap is an excellent choice to reference the model's aeronautical heritage. The correct attachment width is 22 mm in all cases.

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

To replace the strap on the Chronomat B01 42, use a spring bar tool to release the spring bars securing the strap to the lugs. This can be carried out at home with care, or entrusted to a watchmaker or specialist atelier. It is advisable to use a tool with a plastic or nylon tip on the outer side of the lug to avoid scratching the stainless steel case.

Are there aftermarket straps compatible with the Breitling Chronomat B01 42 AB01342B1O1S1?

Yes, there are many aftermarket straps compatible with the Breitling Chronomat B01 42 AB01342B1O1S1. The primary requirement is a 22 mm lug width. MilanoStraps offers a curated selection of handcrafted straps in leather, alligator, rubber and NATO nylon, all made to measure and compatible with this reference, with full customisation available through the Casati Milano atelier.

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

The lifespan of a leather strap depends on hide quality, tanning method, and daily care. A high-quality vegetable-tanned calf strap used regularly but not subjected to constant moisture or perspiration can last between two and five years while retaining a well-kept appearance. Top-grade alligator leather, owing to its density and scale structure, typically lasts even longer. MilanoStraps 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