1977, Panama (Republic). Large Silver 20 Balboas Coin. 2500 Struck! Mint Year: 1977 Reference: KM-54. Mintage: 2,500 pcs. Denomination: 20 Balboas Condition: A nice proof-like AU-UNC! Material: Silver (.925) Weight: 129.91gm Diameter: 61mm Obverse: 3/4-length armored figure of Vasco Nunez de Balboa, holding high a sword in right hand and flag in left hand. Date (1977) in field. Le ...