Great Britain 1854 1d Red Brown Plate 1. 181. SG17aGreat Britain 1854 1d Red Brown Plate 1. 181, SG17a. Very fine used left hand marginal imperforate three sides horizontal pair lettered JA JB, neatly cancelled by Manchester '498' sideways duplexes for JY. 1857, rough torn from sheet margin at left and showing part central sheet ornament. An extremely rare variety of which only a handful of examples exist. This pair is believed to be the finest in private hands and therefore a real prize. GB