Riefler Type D Tank Clock
Riefler Type D Tank-Clock
No. 700 from 1948
Astronomical Precision-Pendulum Clock under airtight glass closure with copper cylinder
Movement first Quality, free gravity-escapement with double-escapement-wheel and jewel-pallets
electric winding, electric second-clocking-devise
Nickel-Compensation-Pendel Type J1 sch (Stratification Pendulum)
Totally 33 pendulum clocks of Type D with gravity-escapement were made.
For this pendulum clock Riefler stated a middle daily accuracy of 0,01 to 0,03 seconds.
This made the pendulum clock the end and highlight of mechanical precision-measurement.