This A. Lange & Söhne Watch Makes Every Second Count – The discreetly complex Richard Lange Jumping Seconds.
A lightweight spring discharges a steady amount of force to the escapement each second.
An elaborate double vertical clutch with reset hammer precisely stops and zeros the lightweight seconds hand as the crown is pulled.
Attached to the escapement pinion is a five-pointed star that actuates a separate gear train linked to the seconds hand.
Hidden under the three-quarter plate is a thin lever called the flirt, which revolves once a second, precisely started and stopped by the star.
Look for additional coverage of A. Lange & Söhne’s Richard Lange Jumping Seconds in Robb Report Watch Collector, available in November.