Charleston slave badge from 1806 for Servant No. 4

This is an octagonal metal slave badge. On the recto is text that reads ”CHARLESTON [stamped]” across the top. Under that is “No. [stamped] 4 [punched] / SERVANT [stamped] / 1806 [stamped].” On the verso is a stamped cartouche at the bottom center with the maker's name “C PRINCE.” There is a hole punched at the center top.