Great Britain 1867 2s Dull Blue (Plate 1), SG118var.
A very fine unused original gum top marginal imperforate imprimatur lettered AK from the second, more heavily inked registration sheet showing plate number.
Imprimaturs represent the first stamps printed from the approved and finished printing plate and are highly desirable.
Very rare and unique in private hands.
Provenance: Ex. Bates & Latto.