The Decayed Abacus of Liu Rajshuklam is a 1425 years old piece made by Liu Rajshuklam, a merchant living in Delhi.
Considering its age and the quality of the work, people consider it of no value.
It is engraved with asian patterns and some symbols pertaining to Buddhism.
This piece doesn't exist, but as a legend. It is said that in the year 582, Liu Rajshuklam, the owner, made use of it in Delhi to empower the Rajshuklam family. Now it is lost, or broken, we will never know.