Charleston slave badge from 1845 for Servant No. 1784

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 “1845 [stamped] / SERVANT [stamped] / 1784 [punched].” There is a small chip missing from the top proper left edge. There is a hole punched at the center top.