元代大观通宝 美品。 733 PRE-YUAN MONGOL CHINA: Da Guan, pre-1270, AE cash 406。08g41。 H-19。7。 da guan jin he, the curved style of the da is correct for this period, as is the casting style, but possibly a later casting, Fine to VF, R, ex Shegravengbideacutebao Collection。