1877: Surface-Printed 2½ pence, plate 16, lettered PG, imperforate Plate Proof, printed in black on wove paper, strong colour, four margins all around. Thin to reverse on right side, of fine appearance. Rare example from the Inland Revenue's reference archives. Very few in private hands. Cert. PTS (2012).
Remark: A very rare plate proof in black, only three singles from plate 16 lettered PG, PH and OI (Royal Collection!) are recorded in the Karl Louis Card Index.
