134517 1954 6D WILDING (SG523) LOWER MARGINAL BLOCK OF SIX, LOWER PAIR 'IMPERFORATE BETWEEN STAMP AND LOWER MARGIN'.

1954 6D WILDING (SG523) LOWER MARGINAL BLOCK OF SIX, LOWER PAIR 'IMPERFORATE BETWEEN STAMP AND LOWER MARGIN'. A fine unmounted og lower marginal vertical block of six with most unusual ERROR OF PERFORATION with upper pair DOUBLE PERFORATION, lower block of four DOWNWARD SHIFT OF PERFORATIONS and lower marginal pair TOTALLY IMPERFORATE BETWEEN STAMPS AND LOWER MARGINS. A very rare error and the first example we have seen in 40 years. (Ref 134517).