Breitling Caliber B04

Brand	Breitling
Caliber Number	B04
Base Caliber	Breitling B01
In-House?	Yes
Certified Chronometer?	Yes
Beat Rate / Frequency	28,800 bph / 4 Hz
Power Reserve	70 hours
Jewel Count	47
Anti-Shock Device	KIF
Chronograph System	Column Wheel
Hand Count	4
Functions	Central hours; central minutes; central chronograph seconds; central GMT hand; small running seconds subdial at 9:00; 1/4 seconds; 30 minutes counter at 3:00; 12 hours counter at 6:00; date at 4:30
Country of Manufacture	Switzerland, Swiss made
Known Models	Breitling Transocean Chronograph GMT, Chronomat GMT (Add your watch tot he comments below…)

Breitling caliber B04 is an in-house automatic chronograph movement with 47 jewels, beating at 28,800vph with a power reserve of about 70 hours.

B04 VS B01:

The Breitling calibre B04 is based on the B01 framework. The main difference is that the B04 adds a central GMT hand (second time zone) complication.

Additional Resources:

• Official B04 user manual (pdf)

Not to be confused with Brietling, 804, B-04