Republic Of Panama 1974 Proof 20 Balboas Coin 2000 Grains Sterling Silver. The item "Republic Of Panama 1974 Proof 20 Balboas Coin 2000 Grains Sterling Silver" is in sale since Sunday, October 11, 2020. This item is in the category "Coins & Paper Money\Coins\ World\North & Central America\Panama". The seller is "goldgalusa" and is located in Jackson, Tennessee. This item can be shipped to United States.