The fruit of two years’ research, the B-One is an entirely new instrument-watch made to meet the most stringent needs of aviation professionals. Designed for simple and logical use, it is equipped with the following functions: chronograph with split and add times, countdown, perpetual calendar, second timezone with its own alarm, and UTC time. Optimal read-out guaranteed by oversized hands and NVGcompatible night-time backlighting. The electronic movement can be taken over by a mechanical system. Overdrive pinions operate the slide-rule disk on the dial from the outside by rotating the bezel. The steel case is water-resistant to 50 m. The caseback, in the shape of turbine blades, acts as a resonating chamber. Scratch-resistant, glare-proof recessed sapphire crystal.