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it is a genuine unused, o.g., never hinged, top margin Plate No. 104 Imprint and letter z block of eight, the bottom left stamp with a tiny natural paper inclusion and the bottom right stamp with toning spots.
it is a genuine unused, o.g., hinged, top margin Plate No. 10 and imprint block of six (the left two stamps NH) with horizontal perf separations at the right and the top center stamp with a pulled perf at the right.