Charleston slave badge from 1862 for Porter No. 1107 / 1863 for Servant No. 176

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 “176 [punched] / SERVANT [stamped] / 1863 [stamped].” On the verso is text that reads ”CHARLESTON [stamped]” across the top. Under that is “1862 [stamped] / PORTER [stamped] / 1107 [PUNCHED].” There is a hole punched at the center top.