Breitling · Chronomat B01 42

Strap for Chronomat B01 42 NFL Philadelphia Eagles

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
ReferenceAB01342B1L4S1
FamilyChronomat B01 42
MovementBreitling caliber Caliber B01 Hours, Minutes, Small Seconds | Date | Chronograph, Column wheel | Chronometer
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 AB01342B1L4S1

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Chronomat B01 42 AB01342B1L4S1, seen from the bench

The Breitling Chronomat B01 42 AB01342B1L4S1 is a professional chronograph descended from the 1984 icon created with the Frecce Tricolori. It features a 42mm stainless steel case with bidirectional bezel and characteristic rider tabs for gloved operation. The in-house B01 movement is an automatic chronograph with column wheel and vertical clutch, offering 70-hour power reserve and COSC chronometer certification (±4 seconds/day). Water-resistant to 200m with screw-down crown and pushers. The lug width is 22mm.

Frequently asked questions

What is the lug width of the Breitling Chronomat B01 42 AB01342B1L4S1?

The lug width of the Breitling Chronomat B01 42 AB01342B1L4S1 is 22mm. This measurement is taken internally between the two case lugs at the point where the strap is fitted. Any 22mm strap with a standard 20mm tail is compatible with this reference.

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

The most suitable options for the Chronomat B01 42 are a vegetable-tanned calfskin strap with smooth grain for everyday versatility, a matte alligator leather strap for formal occasions, and a ballistic nylon NATO or vulcanised rubber strap for sporting use. A stainless steel deployant clasp is recommended to maximise strap longevity and wrist security.

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

The strap on the Chronomat B01 42 is replaced using a fine-tipped springbar tool: compress the two springbars securing the strap to the lugs and slide the strap free. No specialist tools are required, though care should be taken to avoid scratching the stainless steel case. The replacement strap must have a 22mm lug width.

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

Yes, the aftermarket offers a wide selection of straps compatible with the Breitling Chronomat B01 42 in 22mm. Milanostraps.it stocks handcrafted straps in calfskin, alligator and synthetic materials produced by Casati Milano, available with contrast stitching and stainless steel buckles or deployant clasps. Artisan quality ensures precise fitting and superior longevity compared to standard issue straps.

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

The lifespan of a leather strap depends on the quality of the hide, care and frequency of use. A high-quality vegetable-tanned calfskin strap, kept away from excessive moisture and treated periodically with a leather conditioner, typically lasts 2 to 4 years with daily wear. Casati Milano straps carry 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.

Request an appointment →

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