179738 ⎘
Apparatus for measuring unknown time intervals by mechanical means using a mechanical oscillator; Watches or clocks with stop devices, e.g. chronograph; Special arrangements with a separate barrel for the chronograph functions
Chronograph mechanism
#2Chronograph mechanism
#3Mechanical watch movement
#4Device comprising a clock movement and a chronograph module
#5Device comprising a clock movement and a chronograph module
#6Device comprising a clock movement and a chronograph module
#7Running reserve indicator for a mechanical clockwork
#8Display device for a watch
#9Device comprising a clock movement and a chronograph module