Breitling Caliber B01 Watch Movement

Manufacturer	Breitling
Caliber Number	B01
Base Caliber	B01
In-House?	Yes
Certified Chronometer?	Yes (COSC)
Jewels	47
Vibrations Per Hour	28,800 bph
Power Reserve	~70 hours
Hacking Seconds?	Yes
Anti-Shock System	KIF
Chronograph System	Column Wheel
Functions	Central hours; central minutes; central chronograph hand; small running seconds at 9:00; 1/4 seconds; 30 minutes counter at 3:00; 12 hours counter at 6:00; date at 6:00
Country of Manufacture	Switzerland, Swiss made
Known Models	SuperOcean Heritage B01 Chronograph 44, Navitimer B01 Chronograph 43, Navitimer B01 Chronograph 46, Premier B01 Chronograph 42, Super Chronomat B01 44, Avenger B01 Chronograph 45 (Add your watch to the comments below…)

The Breitling caliber B01 is an in-house automatic chronograph watch movement. This movement was introduced by the La Chaux-de-Fonds based Breitling Chronométrie in 2009. First featured in the Chronomat B01, today it is found in a wide array of modern Breitling models.

Some of the topics covered in this caliber listing:

Is the Cal. B01 an in-house movement?

Breitling uses the term “in-house” as well as “manufacture” to describe their calibre B01.

In Breitling’s own words:

“The movement is the heart beating inside your watch; it is made up of hundreds of interdependent parts that work together to provide the vital energy and measure time. Breitling in-house calibers, conceived and produced in our manufacture, are among the most advanced in the world today. A Breitling watch equipped with one of these extraordinary calibers achieves precision, reliability, and an impressive power reserve. Each Breitling manufacture movement blends traditional craftsmanship and uncompromising innovation.” –source

Column Wheel Chronograph:

The chronograph complication in the Breitling B01 is a column wheel style. With its vertical coupling system, the chronograph hand returns to reset position with a smooth and precise motion without undesirable jumpiness observed on other chronograph systems.

How can you tell if your watch has a B01 movement?

First, know the model of your watch. Breitling puts the caliber number “B01” in the full model name. If you want to determine whether the movement in your watch is a B01 without knowing the model number, look for the B01 etching/stamp underneath the balance wheel.