Great Britain 1841 1d red brown Plate 90 specimen, SG8s.
A superb unmounted mint with full original gum right hand marginal horizontal pair lettered 'OK-OL' showing part sheet inscription, overprinted "SPECIMEN" type 1.
These "SPECIMEN" examples were used solely by postal administrations for reference purposes to help spot any attempted forgeries.
Accompanied with a 2011 Royal Philatelic Society (RPS) Certificate of a block of four from which this pair was taken.
Stanley Gibbons catalogue value: £4,000+.
Plate 90 was registered on 24 May 1849 and put to press shortly thereafter. It was taken from press in early January 1850 and was destroyed on 6 March. The letters from this printing plate are usually clear and clean, but are often misplaced.
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