Charleston slave badge from 1828 for Servant No. 918

This is a square metal slave badge with clipped corners. On the recto is text that reads ”CHARLESTON [stamped]” across the top. Under that is “1828 [stamped] / SERVANT [stamped] / No. [stamped] 918 [punched].” On the verso is a stamped cartouche with the maker's name “LAFAR.” There is a hole punched at the center top with a break in the metal from the hole to the top edge.