Neighbor found this while digging around in his yard. Could someone help me figure out whether it is authentic or not?

by Sweatyboot

http://imgur.com/Cx1z3bO

I posted this on /r/pics and there have been some comments about it being fake. I would love to know more about it.

[deleted]

Fake

It is well established that only Charleston, South Carolina issued slave tags. These would have been worn by the slave, and indicate their occupation and include a tag number. This was a revenue gathering scheme that went on from about 1800 until the end of the Civil War.