Korea, Joseon Dynasty. Sang Pyong Tong Bo; 1 Mun. Kaesong Township Military Office. 1836 (2.52g; 22.8mm). O./ 常 平 寶 通 [Sand p'yong tong bo; Department of Korean Yi Dynasty, currency unit]. R./ 開 日十 [(Kae): Kaesong Township Military Office, (IL): sun, (shi) Series 10.] Mandel#34.19.10 $20