Panama
Republic Balboa 1982 MS61 ANACS, KM39.4. With erroneous silver content (LEY .500) below arms. Extremely rare error with only 11 pieces reportedly struck. Prooflike, mirrored surfaces. A highly interesting and practically unattainable coin.
From the Engelen Collection of World Coinage
HID02901242017
Estimate: 600-800 USD