Most watches at the time beat at just 18,000 A/h, with the balance oscillating 5 times per second. However, this limits maximum precision of a watch, especially a chronograph or stopwatch used for precision timing.
Minerva was a well-known producer of stopwatches and set out to build one with a precision of 1/100 second. The result was a 19 ligne movement with a balance oscillating at 360,000 A/h, 100 times per second. The resulting stopwatch featured a seconds hand that completed a full sweep of the dial every second, with 1/100 second marks.
This stopwatch became famous featured during the credits on the early seasons of American television show, "60 Minutes".
The company would later repeat this feat with a modern movement for Montblanc.