DescriptionKaiyuanTongbao.png 开元通宝 Source Unknown sourceUnknown source Author User Zhuwq on zh.wikipedia Permission (Reusing this file) This image is in
English This is an example of a middle period Kaiyuan coin, when half moons started appearing on the back of the coin. the greay blue patina highlights
English This is an example of a middle period Kaiyuan coin, when half moons started appearing on the back of the coin. the greay blue patina highlights