The Grotesque Sword of Wongsojoyo Addisuson is a 1482 years old piece made by Wongsojoyo Addisuson, a iron smith living in Ulaanbaatar.
Considering its age and the quality of the work, people consider it of some 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 1982, Lindsay Addisuson, the owner, made use of it in New York to empower the Addisuson family. Now it is lost, or broken, we will never know.