Korea, Joseon Dynasty. Sang Pyong Tong Bo; 1 Mun. Court Guard Military Unit. 1832 AD. (3.68g; 23.6mm). O./ 常 平 寶 通 [Sang p'yong tong bo; Department of Korean Yi Dynasty, currency unit]. R./ 禁 七 (Kum): Court Guard Military Unit, (Qi) Series/Furnace 7]. Mandel#27.1.7 $20