China, Jin dynasty 1 cash 1158-1161 Zheng Long Tongbao

Catalog: Hartill# 18.40, FD# 1637, Schjoth# 1083, JEN# 403
Material: Bronze
Weight: 3.73 g
Diameter: 29.00 mm
Since the proclamation of Great Jin in 1115, coins of the Song and Liao dynasties were used in circulation. It was only in 1158 when the first Great Jin coins were cast.