L2165, Korea "Hae-Tung Tong-Bao" Ancient Coin, Seal Script (b), AD 1102.
Fine, please refer the picture. Character: Seal Script.
Minted by Ancient Korean emperor during around AD 1102. One of the scarce coin in Korean history.
Please note this coin has heavy patina, which is the original patina. It is not suggested to clean it.
Size: 23 mm in diameter. Weight: around 3 to 4 gram.