Charleston slave badge from 1824 for Porter No. 469

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 “1824 [stamped] / PORTER [stamped] / No. [stamped] 469 [punched] / LAFAR [stamped].” There is a hole punched at the center top.