1850 1D ARCHER EXPERIMENTAL PERFORATION (SG16b) PL.98 LETTERED AL - INCREDIBLE TRIO MATCHED WITH 1D IMPERF (SG8) IN STATES ONE AND TWO. Used 1849 1d pl. 98 (SG 8) lettered AL in state one, just shaved at top and cancelled '92' of Bolton matched with 1850 1d Archer which is well centred but pinhole and short perforations, cancelled London '73' District numeral. Also matched with good used imperf (SG8) with four close margins but in STATE TWO showing MUCH WEAKER CHECK LETTERS AND RE-ENTRY. The imperf state 2 evidently printed after the Archer. VERY RARE TRIO. (Ref 90079).