PL.11 (AK BK)(SPEC C6)/MISSING IMPRIMATUR LETTERING. A good to fine used vertical pair 1855 die 2 1d pl.11 lettered AK BK, centred high but AK fine perforations, BK one short perforation at left. A good piece - AK MISSING IMPRIMATUR LETTERING but BK still on imprimatur sheet. (Ref 106050).
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