This rim-perforated pottery was excavated from a shell mound in Songpyeong-dong, Unggi, Hamgyeongbuk-do. This type of earthenware, a typical one of the early Bronze Age, has small, regularly-spaced perforations below the mouth. This pottery’s mouth extends outside, and two rows of perforations, showing features unlike those of other ordinary rim-perforated pottery objects discovered so far.