PL.20 (AK)(SPEC C6)/MISSING IMPRIMATUR LETTERING. Fine used 1855 die 2 1d pl.20 lettered AK L.C.14 (spec C6) with fine perforations and lightly cancelled. Stamp shows MISPLACED WATERMARK (not thinned paper). MISSING IMPRIMATUR LETTERING. (Ref 107769).