V4010, Huang-En Tong-Bao Coin (Hoang An Thong-Bao), Annam Famous Unknown Coin

V4010, Huang-En Tong-Bao Coin (Hoang An Thong-Bao), Annam Famous Unknown Coin.

Bronze, VF condition, please refer the picture.

The name of the coin is "Huang-En Tong-Bao (Hoang An Thong-Bao)", which is one of the most famous unkonwn coins of Vietnam(Annam). Up to now, no historian or numismatist can give the details of this coin. Hua Guang-Pu's catalogue regarded this coin as unknown coin.

Diameter: 22 to 23 mm.

Weight: around 3.0 to 4.0 gram.