Breitling · Chronomat B01 44

Strap for Chronomat 44 Stainless Steel / Onyx Black Roman / Calf

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
ReferenceAB011012.B956.435X
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 AB011012.B956.435X

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Chronomat B01 44 AB011012.B956.435X, seen from the bench

The Breitling Chronomat B01 44 AB011012.B956.435X is a stainless steel chronograph with a 44mm case and onyx black Roman dial. Powered by the Breitling Caliber B01, a chronograph movement with column wheel certified COSC and approximately 70 hours of power reserve, it features the characteristic bidirectional bezel with rider tabs at 12, 3, 6 and 9 o'clock. The watch has a 22mm lug width and showcases a classical three-counter layout with subdials for running seconds, elapsed minutes and elapsed hours.

Frequently asked questions

What is the lug width of the Breitling Chronomat B01 44 AB011012.B956.435X?

The Breitling Chronomat B01 44 AB011012.B956.435X has a lug width of 22mm. This measurement must be taken internally between the two lugs at the point where the springbars attach. It is essential to respect this dimension to ensure correct and secure strap fitting.

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

The Chronomat B01 44 pairs particularly well with square-scale alligator straps for formal occasions, polished calf leather for business use, shell cordovan in vegetable tanning for those seeking character and patina over time, and vulcanised rubber for sporting use. A NATO in nylon or woven silk is ideal for daily wear, echoing the model's aeronautical heritage.

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

To replace the strap, the 22mm springbars between the case lugs must be removed. Using a bifurcated springbar tool, compress both ends of the bar to release it from the lugs. The operation is fully reversible and does not require a watchmaker, though care should be taken to avoid scratching the case surfaces.

Are there aftermarket straps compatible with the Breitling Chronomat B01 44 AB011012.B956.435X?

Yes. Any strap with a 22mm attachment is compatible with the Breitling Chronomat B01 44, provided the springbars are of the correct diameter (typically 1.8mm). Milano Straps offers an extensive selection of handcrafted 22mm straps in various materials and finishes, available bespoke or ready to ship, all compatible with this reference.

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

The lifespan of a leather strap depends on the material, frequency of use, and maintenance. A quality alligator or shell cordovan strap, used carefully and kept away from prolonged exposure to water and perspiration, can last between 3 and 5 years or more. Calf leather typically lasts between 1 and 3 years. Milano Straps provides an 18-month warranty against manufacturing defects on all handcrafted straps.

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