Great Britain 1840 1d black plate 4, SG2.
Very fine and fresh unused original gum four margin block of four lettered AD-BE. A very rare and desirable block of the world's first postage stamp.
Provenance: Ex. Lea, Tes.
Accompanied with a British Philatelic Association (BPA) certificate of authenticity.
GB Specialised Catalogue Number: AS23
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