Great Britain 1964 2½d 20th International Geographical Congress (Phosphor) imprimaturs, SG651p var
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£10,500.00
SKU GL11
Great Britain 1964 2½d 20th International Geographical Congress (Phosphor), SG651p var.
Superb unmounted mint with full original gum imperforate bottom left hand corner marginal cylinder block of four imprimaturs 'Cyl.3D-1C-1B-1A' with 'British Postal Museum and Archives' handstamps on reverse.
A remarkable and unique item.
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