An ingenious if long-winded mechanical timepiece created in 2013 by Turnvator Janosch.
Every minute, a ball is released onto an inclined track where traps indicate the time in minute, five-minute and hourly intervals.
Driven by a 2.5kg weight, the clock runs for twelve hours at a time and according to its inventor, has an accuracy error of just one second in 24 hours.
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