The Unique Compass of Akiba Museum is a 1245 years old piece made by Akiba Museum, a engineer living in Ulaanbaatar.
Considering its age and the quality of the work, people consider it of high value.
It is engraved with asian patterns and some symbols pertaining to Jainism.
This piece doesn't exist, but as a legend. It is said that in the year 769, Akiba Museum, the owner, made use of it in Ulaanbaatar to empower the Museum family. Now it is lost, or broken, we will never know.