Great Britain 1855 2d blue Plate 4, SG23.
A very fine lightly mounted unused, with original gum, example lettered 'RG'.
A very scarce stamp in this high condition grade and a major British rarity.
Accompanied by a 1990 Royal Philatelic Society (RPS) Certificate of Authenticity.
SG Catalogue Value: £10,000.
Plate 4 was finished on 29 November 1849, with printing commencing the following month. For the first four years, the sheets of stamps from this plate were issued in the imperforate condition.
Official perforation of the 2d blue came into operation on 31 January 1854 and from that date the stamps were issued in perforated sheets.
Plate 4 is the only two pence plate from which stamps were issued both imperforate and perforated.
