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StuartBaker104

By StuartBaker104
in All Things Clocks

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wls1971 Distinguished Member

wls1971

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Posted

Greenwich obseravatory that 's the Martin Burgess clock B which ran in 2014 in a 100 day trial and lost 5/8th of a second putting it in the Guiness book of records as the “most accurate mechanical clock with a pendulum swinging in free air.

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      By VWatchie · Posted

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      By Neverenoughwatches · Posted

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