China
Southern Song Dynasty, Emperor Ning Zong 10 Cash ND (1208-24), Hartill-17.634 (R5), FD-1417, S-958, 51mm, XF. Jia Ding yuan bao on the obverse. Zhe shi on the reverse. Even brown patina with no egregious flaws. A very rare issue.From The Dr. Patrick Tan Collection
Estimate: 2000-2500 USD