1D ARCHER PL.99 EXPERIMENTAL PERFORATION (BF) ON 1854 COVER LONDON TO STAFFS (SG16b). 1854 letter London to Shelton, Staffs with a very fine 1d Archer pl.99 lettered BF tied neat London "88" duplex with chamfered squared date stamp FE 17 54. Matched with very fine four margined 1d imperf. Back stamped HANLEY STAFFS FE 18 1854 in green. (Ref 89542).