WATERMARK ON THICK PAPER: 1/6d dull claret WCG McCracken Imprint block of 4 ACSC 162ze with Aberrant Perfs below the Imprint & Causing Double Perfs on both lower units, the lower units are unmounted, Cat $500++ (mounted). A technically very interesting item. [NB: the latest ACSC 'KGV' volume accidentally omits the McCracken Imprint in this issue]