The 24 hour gate clock a benchmark and standards of length at Greenwich Royal Observatory London England

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Size: 3433px × 5150px
Photo credit: © Tony Wright/earthscapes / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: accuracy, accurate, britain, city, gb, great, greenwich, heritage, historic, historical, history, keeping, king, kingdom, kings, london, measure, measurement, metrication, navigate, navigation, observatory, park, royal, time, tourism, tourist, travel, travelling, uk, united