Great Britain 1875 1d rose red Plate 190 imprimatur, SG43var.
A superb unused four margin top left hand corner marginal imperforate imprimatur lettered "AA" (first stamp from sheet), showing part sheet inscription, part current number and plate number "190".
Very rare, believed to be one of only two corner examples in private hands.
Previously sold by Stanley Gibbons in 2012 for £2,750.
