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Time / United States Naval Observatory / Time signal / Marine chronometer / Time ball / Dent / Watch / Time zone / Shepherd gate clock / Horology / Measurement / Clocks
Date: 2008-12-06 16:50:19
Time
United States Naval Observatory
Time signal
Marine chronometer
Time ball
Dent
Watch
Time zone
Shepherd gate clock
Horology
Measurement
Clocks

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