Korea, Joseon Dynasty. Sang Pyong Tong Bo; 2 Mun. Ministry of Defence. 1742-1752. (6.64g; 30.5mm). O./ 常 平 寶 通 [Sand p'yong tong bo; Department of Korean Yi Dynasty, currency unit]. R./ 营 月 o  (Yong): Special Army Unit, Oyongchong Seoul, (Wool):  Moon, Circle to right]. Mandel#25.18.10 $30