1978 GUERNSEY 5p and 11p OLD PRINTS (SG 161/163). Two fine unused lower right corner marginal imperforate blocks of 4 from the original printer's sheets of 100 taken during printing to proof the plate with manuscript notations and corrections. Sheets dated 17 and 19.7.77 and endorsed 'Corrected'. Unusual. (Ref 39268).
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