For those who remember the thrilling Bi-Frequence 1000, with the Villeret movement that measured elapsed times to 1/1000th of a second, this is a similar, more accessible version. It measures elapsed intervals to 100th of a second according to the same principle, with the newly developed Montblanc/Minerva Caliber MB M66.25. It vibrates at a frequency of 50 hertz or 360,000 vph, with two balance wheels – one dedicated to the chronograph and the other to regular time, each powered by a separate mainspring barrel. It is equipped with two zero-return mechanisms: one for the 100ths of a second and another for elapsed minutes and seconds. The movement was made entirely by hand, including plate, bridges, and balance spring. Montblanc’s Minerva manufacture launched its first 100th of a second chronograph as early as 1916.