Charleston slave badge from 1833 for Servant No. 16

This is a square metal slave badge set on point with clipped corners. On the recto is text that reads ”CHARLESTON [stamped]” across the top. Under that is “No. [stamped] 16 [punched] / SERVANT [stamped] / 1833 [stamped].” There is a hole at each corner. There is a crack leading from the top center hole to the proper right edge.