Richard Habring's work is amazing. However, others are guilty of passing off the foudroyante mechanism as a
fancifully 'high accuracy' chronograph. However this requires somewhat of a stretch of the imagination and a calibration curve to achieve. Rapwatch
Originally designed to allow a chronograph to measure smaller increments than a second.
This complication traditionally allows a chronograph to measure 1/8th or 1/6th of a second depending upon the balance vbh rate. A 28,800 or 21,600vph would determine whether or not it was 1/8th sec. or 1/6th sec. The Habrings rather like the movement of t...