1883 ½d BRIGHT GREEN QUEENS' COLLEGE CAMBRIDGE (CS15) VERY FINE UNUSED CORNER BLOCK OF FOUR IMPERFORATE AT FOOT AND RIGHT. Very fine unused lower right corner marginal BLOCK OF FOUR 1883 ½d bright green Queens' College Cambridge (CS15), unmounted o.g., usual heavier brown gum. Stamps imperforate at foot and right from corner of sheet. (Ref 144258).
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