This coin is denominated as "Yi Fen" (the two characters on the reverse), making it equivalent to 1 Fen (or candereen) of silver. To be such a valuable denomination, it is huge - 47mm and 18.2g. I was hoping for a larger one (~50mm), but this will do. This coin was cast by Ming rebel Sun Kewang from 1648 to 1657. When his father, rebel Zhang Xianzhong, died, Sun took the remnants of his father's army to Guiyang city in Guizhou province. There, he took on the reigh title Ping Dong Wang, or the King who Pacifies the East. He went on conquering areas in the southwest until he was forced to surrender to the Manchus (the Qing) in 1657. The characters "Xing Chao" (top and bottom) translate to "Prosperous Dynasty," which shows Sun's ambition to establish a new dynasty.