Until the last century, precision pendulum clocks (PPC) kept the exact time for several months in observatories. From there, time was distributed to public clocks such as the town hall or station clock. Steffen Cornehl has completed his first PPC in 2000. The popular typical regulator dial has its origin in the precision pendulum clocks. But why is the hour hand out of the center and has been moved to the 6 instead? Because it would cover the second hand every day between 5 and 7 o’clock. The second hand is the most important hand on a ppc.