Gold Coin - Double Eagle Liberty Head United States. Authenticity is guaranteed and certified by Numismatic Guaranty Corporation, the coin is sealed within the protective NGC plastic slab. To verify the authenticity of my coin, please enter the certification number (see above). NGC certificate verification web page. Country: The United States of America.And see over 2,000 coins and medals. The item "1869 Gold Coin $20 NGC AU55 Double Eagle Liberty Head United States" is in sale since Saturday, July 11, 2020. This item is in the category "Coins & Paper Money\Coins\ US\Errors". The seller is "worldqualitycoins" and is located in Nokomis, Florida. This item can be shipped worldwide.