Bello,ma sempre troppo grande?43mm Last but not least is the Breitling Navitimer 8 Unitime, the world-time edition of this collection. This model differs from the rest of the collection in several ways. First, it is the only one available with a silver dial (but no blue dial). Second, it shows an interesting complication, and this display is based on an in-house movement, the calibre B35. While we could have expected a movement based on Tudor’s architecture (remember the Tudor / Breitling Mechanical Alliance), the Unitime is based on another movement, which was Breitling’s first in-house development without a chronograph. It features two barrels for a 70-hour power reserve and a dual-acting ball-bearing rotor.