unmounted mint Block Larger Than four POSTAGE DUES: 1968 1c. to 20c. (less 10c.), each in a complete imperforate sheet of 100, the 12c. and 20c. on 1969 white paper, a few with printer's ink notations and each signed and dated between "9/8/67" and "12/11/69"; heavy central vertical crease through each sheet, resulting in a little splitting at foot and other minor faults, the 12c. sheet crease repaired with sellotape. A remarkable lot.