1855 DIE 2 1D RES.PL.18 IMPRIMATUR LETTERED AI. A very fine imperforate top marginal imprimatur from 1855 die 2 1d res.pl.18 lettered AI in deep red-brown on blued paper with four fine margins and large part top sheet margin with marginal inscription. Watermark large crown. Reserve plate 18 was never used for printing and the only available examples are from imprimaturs such as this. (Ref 139191).
