Great Britain 1840 1d black plate 1a, SG2. Superb unused original gum four margin horizontal pair lettered SE-SF. Beautiful deep colour and gum from an early impression. An exceptional pair of the highest rarity. Accompanied with two independent certificates of authenticity: 1991 Dienna and 1994 British Philatelic Association (BPA). Provenance: Ex Mayflower Grand Prix Collection.
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