Great Britain 1854 6d mauve, SG58Great Britain 1854 6d mauve Embossed on paper watermarked V R in single lined letters, SG58. A superb mint example with original gum and, exceptionally, cut square with four clear margins. A very rare stamp in such exquisite condition. Accompanied with a Royal Philatelic Society (RPS) Certificate of Authenticity. The Embossed postage stamps from Great Britain were issued during the reign of Queen Victoria between 1847 and 1854. They were a very