1d. rose-red, Imprimatur, with Letters in all four Corners, plate 180, AA, imperforate upper left corner sheet marginal with inscription and plate number ‚180‘, large margins, very fresh. The unique corner marginal Imprimatur from plate 180 in private hands (AL is in the N.P.M.(London), TA is in the Royal Collection, TL is still attached to the Imprimatur sheet).
