Great Britain 1869 2d blue Plate 13, SG46.
A very fine unused with original gum block of four lightly mounted on top two stamps only, lettered "CB-DC".
Lovely colour and gum and particularly well centred for this issue.
Accompanied with a 2001 Royal Philatelic Society (RPS) Certificate of Authenticity.
SG Catalogue Value: £2,400.