Chain-driven clock movements
Movements with a running time of approx. 7 days per winding.
Their common features:
- Chain-driven with weights
- Made in Southern Germany
In mechanical clock movements, the length of the pendulum is determined by the movement's gear ratios. Therefore, the indicated pendulum length cannot arbitrarily be altered.
This measurement indicates the vibration of the pendulum measured at the circumference of its bob. In order to provide sufficient clearance for the pendulum bob, the inside width of a clock case should be approx. 2 cm greater than the pendulum's swing.