Jahresuhrenfabrik Small Disc Pendulum 400 Day Clock Shelf Clock
Description:
This 400 day clock with disc pendulum was made from mid-1923 to early 1927. The disc pendulum is smaller than on earlier clocks.
Pendulum diameter: 69.5 millimeters (about 2 3/4 inches). Pendulum weight: 2 samples were 11.2 ounces, and 1 sample was 10.4 ounces. It uses a 0.0035 inch thick Horolovar suspension spring,