1861 DIE 2 ALP IV (SG42) MATCHED PAIR PL.50 AND 51 LETTERED OJ. Two good used examples 1861 1d rose-red on white paper from plates 50 and 51 both lettered OJ, both a little off centre but no other faults. These plates are the only plates with Alphabet IV check letters. (Ref 108575).
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