PL.8 (AD)(SG24) ON COVER/DOUBLE PERFORATIONS (SPEC C3k). Fine wrapper London to Ludlow, Salop with a very fine die 2 1d pl.8 lettered AD S.C.14 tied London "17" Inland numeral and back stamped LUDLOW AU 22 1855. Stamp clearly shows DOUBLE PERFORATIONS AT SIDES AND TOP, and is an excellent example of this scarce error, seldom seen on cover. MISSING IMPRIMATUR LETTERING. (Ref 106111).