First-ever mechanical clock | THE SEIKO MUSEUM GINZA
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China Icons on Twitter: "#DidYouKnow that #China invented the mechanical clock in 723AD? It was created by Yi Xing and would have looked something like this... https://t.co/X6w6mSG0Qg" / Twitter
First-ever mechanical clock | THE SEIKO MUSEUM GINZA
History of Clock - Early Mechanical Clocks
