Korea, Joseon Dynasty. Sang Pyong Tong Bo; 2 Mun. Treasury Department. 1742-1752 AD. (6.63g; 30.4mm). O./ 常 平 寶 通 [Sang p'yong tong bo; Department of Korean Yi Dynasty, currency unit]. R./ 户 洪  [(Ho): Treasury Department, (Hong) Thousand character classic meaning flood]. Mandel#13.73 $30