Any insights would be most appreciated. Tong Yong Shi Wen is translated as 10 Cashes For Circulation . Fan is not necessary meant Foreign , in old Imperial Chinese vocabulary it also was used to stand for Barbarian , which could indicate the uncivilized minority or foreign people. In this coin, it should mean the former . I have seen this coin posted and discussed on a publication.
Some numismatists consider it as a fantasy.
Any additional information highly appreciated.