1852-4 1D PL.157 MATCHED PAIR LETTERED HG 1D IMPERF (SG8) AND 1D PERF (SG17) WITH CONSTANT VARIETY. Good used 1852 1d pl.157 imperf (SG8) lettered HG with four close but clear to fine margins cancelled '938' of Croydon, matched with fine to very fine example of the very scarce perforated issue S.C.16 (SG17) with London '79' cancellation. Both clearly show EXCELLENT CONSTANT VARIETY 'SHORT VERTICAL LINE ABOVE TOP LEFT SERIF OF H' (spec B2l and C1j). Superb and rare matched pair. Ex Folkard. (Ref 120620).