Great Britain 1877 4d Sage green Plate 15 SG153var.
A very fine unused imperforate horizontal pair with original gum lettered PI-PJ, overprinted "SPECIMEN" type 9.
GB Specialised Catalogue No: J64s.
A scarce Queen Victorian Specimen stamp as an imperforate pair.
The "SPECIMEN" examples were used solely by postal administrations for reference purposes to help spot any attempted forgeries.
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