1D ARCHER PL.98 EXPERIMENTAL PERFORATION USED ON COVER (SJ) (SG16b). 1851 envelope used locally in London with a fine 1d Archer Experimental Perforation pl.98 lettered SJ tied London district numeral. London date stamp DE 15 1851. Fine usage prior to the introduction of officially perforated stamps. (Ref 100529).
%20(SG16b).){kind=link}