1852-4 DIE 1 PL.157 MATCHED PAIR 1D IMPERF (SG8) AND 1D PERF (SG17) LETTERED OA. Very fine used 1852 1d imperf pl.157 (SG8) lettered OA matched with good 1d perf S.C.16 (SG17) cancelled "233" of Darlington. Both show SLANTING O and MISPLACED A. Very fine matching, ex Folkard. (Ref 106924).