100531 - 1D ARCHER PL.93 EXPERIMENTAL PERFORATION ON COVER (EC) (SG16b).

1D ARCHER PL.93 EXPERIMENTAL PERFORATION ON COVER (EC) (SG16b). 1853 mourning envelope London to Bath with fine 1d Experimental Archer pl.93 lettered EC tied London "41" inland numeral clear of Alphabet 1 check letters. London back stamp 21 DE 1853 and BATH receiver DE 22 1853. Good usage used before the official introduction of perforation. (Ref 100531).