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8 days

The name of this type of clock is after its winding time.

Eight days is to grant to absentminded people one more day to wind it before the clock definitely stops .

The same reasoning is worth for all classical winding times: in 30 hours clocks, 6 hours were added to wind the clock after one running day, 40 days clocks gave ten days of delay to wind a one month duration clock, and finally 400 days clocks granted the " timekeeper in charge", after one running year ,35 days before stopping.



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