Reference
Note:
Thierry (CMV, Page 41) regards this as a private issue dating from the second half of the 14th century. However it should be noted that this example is substantially larger and heavier than the specimen figured by Thierry.
Reference
Thierry CMVS : Page 48, # 118 [not figured here, but the same coin as in CMV, Figure 191.]
Note:
Thierry (CMVS, Page 48) describes this inscription as a hybrid between two Chinese inscriptions: a Tian Sheng yuan bao and a Xiang Fu yuan bao.