Breitling · Chronomat B01 44

Strap for Chronomat 44 Stainless Steel / Rose Gold / Mirage Red Roman / Croco

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
ReferenceCB011012/K523/743P
FamilyChronomat B01 44
MovementBreitling caliber Caliber B01 Hours, Minutes, Small Seconds | Date | Chronograph, Column wheel | Chronometer
CaseRose Gold, Stainless 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 CB011012/K523/743P

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Chronomat B01 44 CB011012/K523/743P, seen from the bench

The Breitling Chronomat B01 44 CB011012/K523/743P combines stainless steel and 18K rose gold in a 44mm case with a 22mm lug width. Powered by the Breitling B01 automatic chronograph movement certified COSC with approximately 70 hours power reserve, it features a bidirectional rotating bezel, complete chronograph function, and water resistance to 200 meters. The two-tone design balances sportiness with precious material refinement.

Frequently asked questions

What is the lug width of the Breitling Chronomat B01 44 CB011012/K523/743P?

The lug width of the Breitling Chronomat B01 44 CB011012/K523/743P is 22mm. This measurement is taken at the narrowest point between the two case lugs, where the strap is secured via spring bars.

What is the best strap for the Breitling Chronomat B01 44 CB011012/K523/743P?

For the CB011012/K523/743P in stainless steel and rose gold, a vegetable-tanned alligator strap in dark brown (testa di moro) offers the most coherent chromatic and material pairing. Box-calf leather provides everyday versatility, whilst FKM rubber is the preferred choice for sporting and water-adjacent use.

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

To replace the strap, the 22mm spring bars securing the original strap to the case lugs must be removed using a spring bar tool with a fine tip. Apply gentle pressure in the notch on the side of the lug. Always work on a soft surface to prevent scratches to the case.

Are there aftermarket straps compatible with the Breitling Chronomat B01 44 CB011012/K523/743P?

Yes. Any strap with a 22mm lug width is technically compatible with the Chronomat B01 44 CB011012/K523/743P, provided the strap end profile suits the curved lugs of the Breitling case. Milano Straps offers a curated selection of handcrafted 22mm straps specifically designed for this case profile.

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

The lifespan of a leather strap depends on the hide type, tanning method, and frequency of wear. A quality handcrafted alligator or calf strap with vegetable tanning, properly maintained with leather conditioner and kept dry after perspiration exposure, can last between 3 and 7 years. Prolonged contact with moisture is the primary cause of premature wear.

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