Two items: an ANS by Paul Samuelson at the end of a 1980 letter written to him, asking if the U.S. will have a gold-backed currency by 1990, in full: "No—not in the sense that every $ can be converted into gold or into anything else (other than itself). But, probably, like Canada and S. Africa, we shall issue and sell at a profit some gold coins. And some public debt may be redeemable in gold"; and an FDC honoring the United Nations, signed in black felt tip by Milton Friedman. In overall fine condition. Accompanied by the original mailing envelope for the Samuelson letter.