Korea, Joseon Dynasty. Sang Pyong Tong Bo; 1 Mun. General Military Office. 1757 AD. (3.97g; 24.1mm). O./ 常 平 寶 通 [Sang p'yong tong bo; Department of Korean Yi Dynasty, currency unit]. R./ 捻 八 o (Chong): General Military Office, (Ba) Series 8, Circle to right]. Mandel#24.2.8 $15