Korea, Joseon Dynasty. Sang Pyong Tong Bo; 2 Mun. Pyongan Provincial Office. 1679-1742. (7.17g; 30.3mm). O./ 常 平 寶 通 [Sand p'yong tong bo; Department of Korean Yi Dynasty, currency unit]. R./ 平  二 [(Pyong): Pyongan Provincial Office (I): series 2] . Mandel#47.21.0 $25