K3603, Chong-Zhen Tong-Bao Coin (Rev: Dot), China Ming Dynasty, AD 1628.
VF, please refer the picture.
Reverse side: dot in above.
Minted by China Ming Dynasty Last Emperor "Si Zong" during AD 1628-1644.
Catalogue Number: H20.293 (David Hartill), FD2026 (Fisher's Ding), S1232 (Schjoth's).
Size: around 21 to 23 mm in diameter.
Weight: around 3 grams.