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April 1, 2024
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12 h, jan 1, 1600 y - Abacus Ring
Description:
Dating back to the early days of China's Qing dynasty, before the calculater watch, there was the abucas ring.
Added to timeline:
8 Dec 2017
0
0
588
Wearable Technology
Date:
12 h, jan 1, 1600 y
Now
~ 424 years ago
Images:
