V2527, Annam Gia-Long Thong-Bao (Jia-Long Tong-Bao), AD1802-1819.
Bronze, VF condition, please refer the picture.
The name of the coin is "Gia-Long Thong-Bao" in Vietnamese, or "Jia-Long Tong-Bao" in Chinese language.
Annam Nguyen Dynasty, Minted by Emperor Nguyen The To during AD 1802 to 1819.
The catalogue No 99.1 (Dr. R. Allan Barker's "The Historical Cash Coins of Viet Nam").
Diameter: 22 to 24 mm.
Weight: around 3.0 gram.