1840 MATCHED PAIR 1D BLACK PL.1A (SG2) AND 1D BLACK PL.1B (SG2) LETTERED PB, PL.1A SHOWING 'P SQUARE RE-CUT' (SPEC AS2b). Good to fine used 1d black pl.1A (SG2) lettered PB, light bend but four fine margins and showing excellent constant variety 'P SQUARE RE-CUT' from re-entry (Spec AS2b). Matched with superb used 1d black pl.1B (SG2) lettered PB with fine to exceptional margins but not showing the variety due to plate re-entry (Spec AS5a). Both cancelled fine strikes red Maltese cross. A very fine matched pair. (Ref 141127).