The Disturbing Abacus of Bakshishum Ozen is a 3510 years old piece made by Bakshishum Ozen, a merchant living in Istanbul / Constantinople / Byzantium.
Considering its age and the quality of the work, people consider it of high value.
It is engraved with central asian patterns and some symbols pertaining to Ancient Mesopotamian religion.
This piece is a generous donation made to Jerusalem in -93 by Yadidatum Ozen, benefactor, who wanted that everyone enjoyed it.