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it is a genuine unused, o.g., hinged, block of four, with a vertical crease at the right of the lower right stamp that extends into the upper right stamp.
it is a genuine unused, o.g., never hinged, block of four, with a short vertical gum bend in the lower left stamp, a shorter perf at the right of the upper right stamp, an unpunched perf at the upper left of the upper left stamp and three broken vertical perfs.
it is a genuine unused, o.g., hinged, block of four, with a short perf at the bottom left of the bottom right stamp and a small thin at the top left edge of the top left stamp.