The Standard Abacus of Gun Von trunkel is a 2612 years old piece made by Gun Von trunkel, a merchant living in Knossos.
Considering its age and the quality of the work, people consider it of high value.
It is engraved with european patterns and some symbols pertaining to Folk religion.
This piece doesn't exist, but as a legend. It is said that in the year 907, Nguyen Von trunkel, the owner, made use of it in Hanoi to empower the Von trunkel family. Now it is lost, or broken, we will never know.