| Manufacturer | Breitling |
| Caliber Number | B04 |
| Base Caliber | Breitling B01 |
| In-House? | Yes |
| Certified Chronometer? | Yes |
| Vibrations Per Hour | 28,800 bph |
| Power Reserve | 70 hours |
| Jewels | 47 |
| Anti-Shock Device |
KIF |
| Chronograph System |
Column Wheel |
| 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 |
Transocean Chronograph GMT, Chronomat GMT |
The 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.
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