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1 ore 10 min, 1 gen 1600 anni - The Abacus Ring

Descrizione:

The Abacus ring was a very early version of the calculator watch, dating back to the Qing Dynasty in China.

Aggiunto al nastro di tempo:

Innovations in Wearable Tech

ByNicholas Myers

14 dic 2017

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0

506

Data:

1 ore 10 min, 1 gen 1600 anni

Adesso

~ 426 years ago

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