The Historic Necklace of Nguyen Gryposcox is a 1103 years old piece made by Nguyen Gryposcox, a copper smith living in Shanghai.
Considering its age and the quality of the work, people consider it of considerable value.
It is engraved with asian patterns and some symbols pertaining to Taoism.
This piece doesn't exist, but as a legend. It is said that in the year 2093, Mai Gryposcox, the owner, made use of it in Delhi to empower the Gryposcox family. Now it is lost, or broken, we will never know.