Breitling · Chronomat B01 44

Strap for Chronomat 44 Stainless Steel / MOP - Roman / 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 diameter44 mm
ReferenceAB011011/A691/131S
FamilyChronomat B01 44
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 44 AB011011/A691/131S

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Chronomat B01 44 AB011011/A691/131S, seen from the bench

The Breitling Chronomat B01 44, reference AB011011/A691/131S, is a recognizable Swiss chronograph featuring a 44mm stainless steel case and column wheel chronograph movement. The in-house developed B01 caliber is an automatic mechanical movement with COSC chronometer certification, 28,800 vibrations per hour, and approximately 70 hours of power reserve. The 22mm lug width accommodates the model's robust proportions and instrumental heritage.

Frequently asked questions

What is the lug width of the Breitling Chronomat B01 44 AB011011/A691/131S?

The lug width of the Breitling Chronomat B01 44 reference AB011011/A691/131S is 22mm. This measurement is taken with a digital calliper positioned between the two lugs at the point where the strap is inserted. It is a standard size offering a wide selection of quality aftermarket straps.

What is the best strap for the Breitling Chronomat B01 44?

For the Chronomat B01 44, the most suitable materials are vegetable-tanned calfskin, for those seeking a natural patina over time, and matte-finished alligator belly for a more formal register. For sporting or outdoor use, vulcanised rubber or ballistic nylon NATO straps maintain consistency with the model's instrumental vocation. The lug width is 22mm.

How do you change the strap on a Breitling Chronomat B01 44?

The strap on the Chronomat B01 44 is replaced using a springbar tool, a fine-tipped instrument that compresses the spring bars housed within the lugs. Insert the tool laterally inside the lug, compress the bar and slide the strap free. Care should be taken to avoid scratching the steel case: use a soft cloth for protection during the operation.

Are there aftermarket straps compatible with the Breitling Chronomat B01 44 AB011011/A691/131S?

Yes. Any strap with a 22mm attachment width and straight end is compatible with the Chronomat B01 44 AB011011/A691/131S. Milano Straps offers a selection of handcrafted 22mm straps in various materials and finishes, compatible with this reference without any modification to the original lugs.

How long does a leather strap last on a Breitling Chronomat B01 44?

The lifespan of a leather strap depends on the material, care and frequency of use. A quality vegetable-tanned calfskin strap, with daily wear and proper maintenance (kept away from water and excessive perspiration), typically lasts between 2 and 4 years. An alligator strap, owing to the density of its natural fibres, can exceed 5 years. Milano Straps straps are covered by 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.

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