Korea, Joseon Dynasty. Sang Pyong Tong Bo; 1 Mun. Pyongan Provincial Office. 1883. (3.04g; 21.8mm). O./ 常 平 寶 通 [Sand p'yong tong bo; Department of Korean Yi Dynasty, currency unit]. R./ 平 天 十  [(Pyong): Pyongan Provincial Office, (Si): 4] . Mandel#47.2A.4 $20