Breitling · Chronomat B01 42

Strap for Chronomat B01 42 NFL New England Patriots / Rouleaux

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
ReferenceAB01342B1C7A1
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 AB01342B1C7A1

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Chronomat B01 42 AB01342B1C7A1, seen from the bench

The Chronomat B01 42 represents the modern evolution of Breitling's Chronomat collection. It is equipped with the in-house Caliber B01 with column-wheel chronograph function and chronometer certification. The 42mm case features 22mm lugs and offers hours, minutes, small seconds and date indication.

Frequently asked questions

What is the lug width of the Breitling Chronomat B01 42 AB01342B1C7A1?

The lug width of the Breitling Chronomat B01 42 AB01342B1C7A1 is 22mm. This measurement is taken with a digital calliper at the strap attachment point, between the two lugs, perpendicular to the vertical axis of the case. At the opposite end (tail), the strap typically tapers to 20mm.

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

The most suitable materials for the Breitling Chronomat B01 42 are alligator belly leather for formal occasions, vegetable-tanned Tuscan calf leather for everyday wear that develops a characteristic patina over time, ballistic nylon NATO straps for sports or summer use, and vulcanised rubber for water-related activities. The correct attachment width is 22mm.

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

To replace the strap on a Breitling Chronomat B01 42, you will need a fine-tipped spring bar tool. Insert the tool into the lug hole where the spring bar sits, compress the spring and slide the bar out. Repeat on both lugs. It is advisable to rest the case on a soft cloth to avoid scratching the bezel or stainless steel case during the operation.

Are there aftermarket straps compatible with the Breitling Chronomat B01 42 AB01342B1C7A1?

Yes, any strap with a 22mm attachment width and a 20mm tail is compatible with the Breitling Chronomat B01 42 AB01342B1C7A1. milanostraps.it offers a curated selection of handcrafted straps in various materials — alligator, calf leather, NATO, rubber — available either made-to-order or ready to ship. The end curvature can be adjusted on request for an optimal fit on the Chronomat lugs.

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

The lifespan of a leather strap depends on the material, frequency of use and exposure to perspiration and environmental conditions. A quality vegetable-tanned calf leather strap, with daily use and proper care, typically lasts 18 to 24 months. An alligator strap, owing to the greater density of its grain, can exceed three years. Avoid prolonged exposure to water and apply a silicone-free leather conditioner periodically.

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.

Request an appointment →

Casati Milano · Via XX Settembre 15, Milan · by appointment only