The oldest abacus
The oldest wearable tech: a 300 year old Chinese Qing Dynasty abacus ring.
Find the latest viral stories and viral news at ivral.
![](http://ivral.com/wp-content/uploads/2021/06/viral-abacus-ring-china.jpg)
The oldest wearable tech: a 300 year old Chinese Qing Dynasty abacus ring.
Find the latest viral stories and viral news at ivral.