Art with clocks


The Dutch artist Christiann Postma has created a clock from 150 clocks that, together, spell the current hour with their hour hands: see the animation on his website.

It appears that the same effect could be produce with fewer clocks by reusing some of the hands in more than one word, especially if the spelled numbers did not have to be in any particular arrangement or orientation, which could be kinda fun. What is the minimal number of clocks that are required to spell every hour of the day at the right times?


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