Caliber B05

About the Breitling Caliber B05

The base is the in-house B01, a column-wheel chronograph with a vertical clutch, a 70-hour reserve and 28,800 vph, and the Unitime module adds 9 jewels to make 56. What sets it apart is the setting: pulling the crown and turning it moves the hour hand, the city disc and the 24-hour ring together, and the date follows, so a change of zone is a single adjustment rather than three. Every B05 is COSC-certified.

In the library it sits under 34 Transocean Chronograph Unitime references, a 46 mm case in steel or red gold, and 3 Breitling for Bentley B05 Unitime references at 49 mm. One is a limited edition.

The B04 is the simpler second-time-zone version of the same base, the B35 the world timer without a chronograph in the Galactic Unitime, and the B03 the split-seconds derivative.