America's Founders designated gold and silver coins as the only "tender in payment of debt" in the US Constitution,Article 1sec. 10.
US gold coins were banned from general circulation starting with Franklin D Roosevelt's Executive Order of1933. Under this order,all circulated gold coins and gold bullion had to be surrendered to the Federal Reserve (Rothchild's Bank & cousins of FDR) in exchange for pper currency at face value, In 1975,gold ownership by the public became legal again causing many American $20 gold coins which had been in Europe to return to the US.Thee coins were used in daily commerce,were nearly one ounce and had a twenty-dollar face value.The $20 face value was based upon an exact gold weight and purity.The two largest and most popular gold coin were the $20 Liberty and the $20 Saint Gaudens.