Breitling · Chronomat B01 42

Strap for Chronomat B01 42 Stainless Steel - Diamond / Black / Rubber

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
ReferenceAB0134721B1S1
FamilyChronomat B01 42
MovementBreitling caliber B01 hours, minutes, small seconds | date | Chronograph, column wheel | chronometer
Year2022
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 AB0134721B1S1

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Chronomat B01 42 AB0134721B1S1, seen from the bench

The Breitling Chronomat B01 42 AB0134721B1S1 belongs to a lineage of technical instruments that shaped Swiss sports watchmaking since 1984. It features a 42mm stainless steel case with night blue dial and column-wheel chronograph caliber B01, COSC-certified. The lug width is 22mm, a dimension that ensures correct proportion between case and strap on this professional pilot's chronograph.

Frequently asked questions

What is the lug width of the Breitling Chronomat B01 42 AB0134721B1S1?

The Breitling Chronomat B01 42 AB0134721B1S1 features a lug width of 22mm. This is the internal measurement between the two lugs of the case, which determines the compatible strap width. To verify, insert a ruler between the lugs and measure the internal gap: you will find exactly 22mm.

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

The most suitable straps for the Chronomat B01 42 are: vegetable-tanned calf leather for daily wear (develops a distinctive patina over time), Louisiana alligator for formal occasions, vulcanised rubber for sports use, and nylon NATO to reference the model's aviation heritage. All available in 22mm width at milanostraps.it.

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

To replace the strap on the Chronomat B01 42, a fine-tipped spring bar tool is required. Insert the tool into the groove of the spring bar between the lug and the strap, compress the spring, and slide the strap free. The operation takes approximately two minutes per side. It is advisable to work on a soft cloth to avoid scratching the steel case.

Are there aftermarket straps compatible with the Breitling Chronomat B01 42 AB0134721B1S1?

Yes, any strap with a 22mm attachment width is compatible with the Breitling Chronomat B01 42 AB0134721B1S1. milanostraps.it offers a selection of handcrafted Made in Italy straps in various leathers and materials, specifically made for this lug width. The Italian artisan quality ensures a precise fit at the lugs and a finish consistent with the standard of the timepiece.

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

The lifespan of a leather strap depends on the material and maintenance. A quality vegetable-tanned calf strap, worn daily and periodically conditioned with leather cream, maintains structural integrity for 2 to 4 years. Alligator, owing to the density of its scales, tends to last longer. Frequent exposure to perspiration or water significantly reduces strap life: in such contexts, rubber or NATO straps are preferable.

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