1831 - One-hand Split-second system

In 1831, Joseph Thaddaeus Winnerl presented his pocket chronoscope watch with a seconds hand that could be stopped and restarted without having to stop the entire movement. It was the first chronoscope watch that allowed the duration of an event to be measured without losing the current time. It was also the first step to develop of the rattrapante function (split-second). The split-second in the most advanced form developed the A. Lange & Söhne as Duoble Split and Triple Split ultimate chronograph.  

Please note that Ferdinand A. Lange was one of the most eager students of Winnerl, and a large part of his watchmaking practices he spent under Winnerl’s supervision.

Źródlo: hautehorlogerie.org, lange-soehne.com

Notifier: Tomasz Jakubas
Other records: Timeline of Watchmaking Innovations