text: Consequently their only way of paying back the debt was in devalued Gold Marks;Historical conversions between currencies are based on the nominal gold standards of each currency: one gold mark ≡ 1⁄2790 kg pure gold; one pound sterling ≡ 113 grains pure gold; one U.S. dollar ≡ 25 8⁄10 grains gold at 9⁄10 fineness (= 23.22 grains pure gold).