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1 h 10 min, 1 janv. 1600 ans - The Abacus Ring

Description:

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

Ajouté au bande de temps:

Innovations in Wearable Tech

ByNicholas Myers

14 déc. 2017

0

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505

Date:

1 h 10 min, 1 janv. 1600 ans

Maintenaint

~ Il y a 426 ans

Les images:

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