Charleston slave badge from 1825 for Porter No. 754

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 “1825 [stamped] / PORTER [stamped] / No. [stamped] 754 [punched] / LAFAR [stamped].” There is a crease on the proper left corner. There is a hole punched at the center top.