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Breitling · Chronomat B01 44

Strap for Chronomat 44 Stainless Steel / Blackeye Blue / Rubber

The Chronomat 44 Stainless Steel / Blackeye Blue / Rubber takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

22mm
22 mm strapsAll Breitling
Lug width22 mm
Case diameter44 mm
ReferenceAB011012.C789.145S
FamilyChronomat B01 44
MovementBreitling caliber B01 hours, minutes, small seconds | date | Chronograph, column wheel | chronometer
Year2011
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

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Straps for the Chronomat B01 44 AB011012.C789.145S

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Chronomat B01 44 AB011012.C789.145S, seen from the bench

The Breitling Chronomat B01 44 (ref. AB011012.C789.145S) is a professional pilot's chronograph born in 1984 from collaboration with Italy's Frecce Tricolori aerobatic team. The 44mm stainless steel case houses the in-house Caliber B01, a COSC-certified chronometer with approximately 70 hours power reserve and column-wheel chronograph mechanism. The watch features iconic rider tabs, screw-down crown (200m water resistance), and a classic display with date, small seconds, and three subdials for chronograph functions. The 22mm lug width is engineered to balance the case mass with the bracelet or strap for optimal aesthetics and fit.

Frequently asked questions

What is the lug width of the Breitling Chronomat B01 44 AB011012.C789.145S?

The lug width of the Breitling Chronomat B01 44 AB011012.C789.145S is 22mm. This measurement should be taken inside the lugs using a digital calliper, close to the spring bar position, to ensure a precise fit for any aftermarket strap.

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

For the Chronomat B01 44, alligator leather with Louisiana grain is recommended for a formal yet sporting aesthetic, while vegetable-tanned calf leather suits a more vintage character. Vulcanised rubber is the practical choice for intensive daily use. The correct lug width in all cases is 22mm.

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

The strap on the Chronomat B01 44 is replaced by removing the spring bars from the lugs using a dedicated springbar tool. It is advisable to work on a soft surface to protect the polished case surfaces. The operation requires no watchmaker intervention and can be carried out in a matter of minutes.

Are there aftermarket straps compatible with the Breitling Chronomat B01 44 AB011012.C789.145S?

Yes, any strap with a 22mm attachment and standard spring bars is compatible with the Breitling Chronomat B01 44. Milanostraps.it offers a selection of handcrafted 22mm straps in leather, rubber, and nylon, designed to fit the lugs of this reference precisely.

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

The lifespan of a leather strap depends on the quality of the tanning, daily use, and care. A vegetable-tanned calf leather strap, regularly treated with nourishing cream and kept away from excessive moisture, can last between 2 and 5 years. 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.

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

The atelier's website: casatimilano.com