China, 1078-1085 AD., Northern Song dynasty, emperor Shen Zong, 1 Cash, Hartill 16.212.

China, Northern Song dynasty (960-1127 AD.), emperor: Shen Zong (Shen Tsung) (1068-1085 AD.), reign title: Yuan Feng (1078 - 1085 AD.), issued 1078-1085 AD.,
1 Cash (25,6 mm / 3,85 g), bronze, cast, square center hole, bigger module, braod rim,
Obv.: ( 元 豊 通 寳 ) , Yuan Feng T'ung Pao (Yuan Feng Tong Bao) (top, right, bottom , left ), seal script, round Bao, small characters.
Rev.: plain (square center hole).
Hartill 16.212 ; Schjöth 545ff ; FD 864ff ; for similar Japanese imitations cf. http://www.history.ucsb.edu/faculty/roberts/coins/Nagasakiexport.html .