The Poor Compass of Bugidai Museum is a 1186 years old piece made by Bugidai Museum, a engineer living in Shanghai.
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 Jainism.
This piece doesn't exist, but as a legend. It is said that in the year 821, Bugidai Museum, the owner, made use of it in Shanghai to empower the Museum family. Now it is lost, or broken, we will never know.